diff --git a/src/GUI/areaitem.cpp b/src/GUI/areaitem.cpp
index 2b7183ff..d35763d2 100644
--- a/src/GUI/areaitem.cpp
+++ b/src/GUI/areaitem.cpp
@@ -25,7 +25,6 @@ ToolTip AreaItem::info() const
 AreaItem::AreaItem(const Area &area, Map *map, GraphicsItem *parent)
   : PlaneItem(parent), _area(area)
 {
-	_map = map;
 	_digitalZoom = 0;
 	_width = 2;
 	_opacity = 0.5;
@@ -35,34 +34,34 @@ AreaItem::AreaItem(const Area &area, Map *map, GraphicsItem *parent)
 	_pen = QPen(strokeColor(), width());
 	_brush = QBrush(fillColor());
 
-	updatePainterPath();
+	updatePainterPath(map);
 
 	setCursor(Qt::ArrowCursor);
 	setAcceptHoverEvents(true);
 }
 
-QPainterPath AreaItem::painterPath(const Polygon &polygon)
+QPainterPath AreaItem::painterPath(Map *map, const Polygon &polygon)
 {
 	QPainterPath path;
 
 	for (int i = 0; i < polygon.size(); i++) {
 		const QVector<Coordinates> &subpath = polygon.at(i);
 
-		path.moveTo(_map->ll2xy(subpath.first()));
+		path.moveTo(map->ll2xy(subpath.first()));
 		for (int j = 1; j < subpath.size(); j++)
-			path.lineTo(_map->ll2xy(subpath.at(j)));
+			path.lineTo(map->ll2xy(subpath.at(j)));
 		path.closeSubpath();
 	}
 
 	return path;
 }
 
-void AreaItem::updatePainterPath()
+void AreaItem::updatePainterPath(Map *map)
 {
 	_painterPath = QPainterPath();
 
 	for (int i = 0; i < _area.polygons().size(); i++)
-		_painterPath.addPath(painterPath(_area.polygons().at(i)));
+		_painterPath.addPath(painterPath(map, _area.polygons().at(i)));
 }
 
 void AreaItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
@@ -85,10 +84,7 @@ void AreaItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
 void AreaItem::setMap(Map *map)
 {
 	prepareGeometryChange();
-
-	_map = map;
-
-	updatePainterPath();
+	updatePainterPath(map);
 }
 
 const QColor &AreaItem::strokeColor() const
diff --git a/src/GUI/areaitem.h b/src/GUI/areaitem.h
index d989fb72..9aa5de61 100644
--- a/src/GUI/areaitem.h
+++ b/src/GUI/areaitem.h
@@ -33,8 +33,8 @@ protected:
 	void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
 
 private:
-	QPainterPath painterPath(const Polygon &polygon);
-	void updatePainterPath();
+	QPainterPath painterPath(Map *map, const Polygon &polygon);
+	void updatePainterPath(Map *map);
 	void updateColor();
 	void updateWidth();
 	void updatePenStyle();
@@ -45,8 +45,6 @@ private:
 
 	Area _area;
 
-	Map *_map;
-
 	qreal _width;
 	QColor _color;
 	qreal _opacity;
diff --git a/src/GUI/gui.cpp b/src/GUI/gui.cpp
index f8267b6c..3a797d3f 100644
--- a/src/GUI/gui.cpp
+++ b/src/GUI/gui.cpp
@@ -1721,8 +1721,7 @@ bool GUI::loadMapNode(const TreeNode<Map*> &node, MapAction *&action,
 
 bool GUI::loadMap(const QString &fileName, MapAction *&action, bool silent)
 {
-	TreeNode<Map*> maps(MapList::loadMaps(fileName,
-	  CRS::projection(_options.inputProjection)));
+	TreeNode<Map*> maps(MapList::loadMaps(fileName));
 	QList<QAction*> existingActions(_mapsActionGroup->actions());
 
 	return loadMapNode(maps, action, silent, existingActions);
@@ -1812,8 +1811,7 @@ void GUI::loadMapDir()
 		return;
 
 	QFileInfo fi(dir);
-	TreeNode<Map*> maps(MapList::loadMaps(dir,
-	  CRS::projection(_options.inputProjection)));
+	TreeNode<Map*> maps(MapList::loadMaps(dir));
 	QList<QAction*> existingActions(_mapsActionGroup->actions());
 	QList<MapAction*> actions;
 	QMenu *menu = new QMenu(maps.name());
@@ -2741,13 +2739,9 @@ void GUI::loadOptions()
 	_mapView->setPOIColor(_options.poiColor);
 	_mapView->setRenderHint(QPainter::Antialiasing, _options.pathAntiAliasing);
 	_mapView->setMarkerColor(_options.sliderColor);
-	if (_options.useOpenGL)
-		_mapView->useOpenGL(true);
-	_mapView->setDevicePixelRatio(devicePixelRatioF(),
-	  _options.hidpiMap ? devicePixelRatioF() : 1.0);
-	_mapView->setOutputProjection(CRS::projection(4326,
-	  _options.outputProjection));
-	_mapView->setInputProjection(CRS::projection(_options.inputProjection));
+	_mapView->useOpenGL(_options.useOpenGL);
+	_mapView->setMapConfig(CRS::projection(_options.inputProjection),
+	  CRS::projection(4326, _options.outputProjection), _options.hidpiMap);
 	_mapView->setTimeZone(_options.timeZone.zone());
 	_mapView->setPositionSource(_positionSource);
 
@@ -2856,14 +2850,12 @@ void GUI::updateOptions(const Options &options)
 		_positionSource = source;
 	}
 
-	if (options.hidpiMap != _options.hidpiMap)
-		_mapView->setDevicePixelRatio(devicePixelRatioF(),
-		  options.hidpiMap ? devicePixelRatioF() : 1.0);
-	if (options.outputProjection != _options.outputProjection)
-		_mapView->setOutputProjection(CRS::projection(4326,
-		  options.outputProjection));
-	if (options.inputProjection != _options.inputProjection)
-		_mapView->setInputProjection(CRS::projection(options.inputProjection));
+	if (options.hidpiMap != _options.hidpiMap
+	  || options.outputProjection != _options.outputProjection
+	  || options.inputProjection != _options.inputProjection)
+		_mapView->setMapConfig(CRS::projection(options.inputProjection),
+		  CRS::projection(4326, options.outputProjection), options.hidpiMap);
+
 	if (options.timeZone != _options.timeZone) {
 		_mapView->setTimeZone(options.timeZone.zone());
 		_dateRange.first = _dateRange.first.toTimeZone(options.timeZone.zone());
@@ -2941,8 +2933,7 @@ void GUI::loadInitialMaps(const QString &selected)
 	if (mapDir.isNull())
 		return;
 
-	TreeNode<Map*> maps(MapList::loadMaps(mapDir,
-	  CRS::projection(_options.inputProjection)));
+	TreeNode<Map*> maps(MapList::loadMaps(mapDir));
 	createMapNodeMenu(createMapActionsNode(maps), _mapMenu, _mapsEnd);
 
 	// Select the active map according to the user settings
@@ -3044,8 +3035,7 @@ void GUI::show()
 
 void GUI::screenChanged(QScreen *screen)
 {
-	_mapView->setDevicePixelRatio(devicePixelRatioF(),
-	  _options.hidpiMap ? devicePixelRatioF() : 1.0);
+	_mapView->setDevicePixelRatio(devicePixelRatioF());
 
 	disconnect(SIGNAL(logicalDotsPerInchChanged(qreal)), this,
 	  SLOT(logicalDotsPerInchChanged(qreal)));
@@ -3057,6 +3047,5 @@ void GUI::logicalDotsPerInchChanged(qreal dpi)
 {
 	Q_UNUSED(dpi)
 
-	_mapView->setDevicePixelRatio(devicePixelRatioF(),
-	  _options.hidpiMap ? devicePixelRatioF() : 1.0);
+	_mapView->setDevicePixelRatio(devicePixelRatioF());
 }
diff --git a/src/GUI/mapitem.cpp b/src/GUI/mapitem.cpp
index e0005819..af275a19 100644
--- a/src/GUI/mapitem.cpp
+++ b/src/GUI/mapitem.cpp
@@ -81,19 +81,18 @@ ToolTip MapItem::info() const
 	return tt;
 }
 
-MapItem::MapItem(MapAction *action, Map *map, GraphicsItem *parent)
-  : PlaneItem(parent)
+MapItem::MapItem(MapAction *action, Map *map, const Projection &proj,
+  GraphicsItem *parent) : PlaneItem(parent)
 {
 	Map *src = action->data().value<Map*>();
 	Q_ASSERT(map->isReady());
 
 	_name = src->name();
 	_fileName = src->path();
-	_bounds = src->llBounds();
+	_bounds = src->llBounds(proj);
 
 	connect(this, &MapItem::triggered, action, &MapAction::trigger);
 
-	_map = map;
 	_digitalZoom = 0;
 
 	_width = 2;
@@ -101,23 +100,23 @@ MapItem::MapItem(MapAction *action, Map *map, GraphicsItem *parent)
 	QBrush brush(Qt::SolidPattern);
 	_pen = QPen(brush, _width);
 
-	updatePainterPath();
+	updatePainterPath(map);
 
 	setCursor(Qt::ArrowCursor);
 	setAcceptHoverEvents(true);
 }
 
-void MapItem::updatePainterPath()
+void MapItem::updatePainterPath(Map *map)
 {
 	_painterPath = QPainterPath();
 
-	QRectF r(bbox(_bounds, _map));
+	QRectF r(bbox(_bounds, map));
 
 	if (r.left() > r.right()) {
 		QRectF r1(bbox(RectC(_bounds.topLeft(),
-		  Coordinates(180, _bounds.bottomRight().lat())), _map));
+		  Coordinates(180, _bounds.bottomRight().lat())), map));
 		QRectF r2(bbox(RectC(Coordinates(-180, _bounds.topLeft().lat()),
-		  _bounds.bottomRight()), _map));
+		  _bounds.bottomRight()), map));
 
 		_painterPath.addRect(r1);
 		_painterPath.addRect(r2);
@@ -143,10 +142,7 @@ void MapItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
 void MapItem::setMap(Map *map)
 {
 	prepareGeometryChange();
-
-	_map = map;
-
-	updatePainterPath();
+	updatePainterPath(map);
 }
 
 void MapItem::setColor(const QColor &color)
diff --git a/src/GUI/mapitem.h b/src/GUI/mapitem.h
index 0ae93a45..72f8d63a 100644
--- a/src/GUI/mapitem.h
+++ b/src/GUI/mapitem.h
@@ -4,13 +4,15 @@
 #include "planeitem.h"
 
 class MapAction;
+class Projection;
 
 class MapItem : public QObject, public PlaneItem
 {
 	Q_OBJECT
 
 public:
-	MapItem(MapAction *action, Map *map, GraphicsItem *parent = 0);
+	MapItem(MapAction *action, Map *map, const Projection &proj,
+	  GraphicsItem *parent = 0);
 
 	QPainterPath shape() const {return _painterPath;}
 	QRectF boundingRect() const {return _painterPath.boundingRect();}
@@ -37,13 +39,12 @@ protected:
 	void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
 
 private:
-	void updatePainterPath();
+	void updatePainterPath(Map *map);
 
 	RectC _bounds;
 	QString _name;
 	QString _fileName;
 
-	Map *_map;
 	int _digitalZoom;
 
 	qreal _width;
diff --git a/src/GUI/mapview.cpp b/src/GUI/mapview.cpp
index be92a7ce..7b8c4472 100644
--- a/src/GUI/mapview.cpp
+++ b/src/GUI/mapview.cpp
@@ -60,12 +60,12 @@ MapView::MapView(Map *map, POI *poi, QWidget *parent) : QGraphicsView(parent)
 	_cursorCoordinates->setVisible(false);
 	_scene->addItem(_cursorCoordinates);
 
+	_deviceRatio = devicePixelRatioF();
 	_outputProjection = PCS::pcs(3857);
 	_inputProjection = GCS::gcs(4326);
+	_hidpi = true;
 	_map = map;
-	_map->load();
-	_map->setOutputProjection(_outputProjection);
-	_map->setInputProjection(_inputProjection);
+	_map->load(_inputProjection, _outputProjection, _deviceRatio, _hidpi);
 	connect(_map, &Map::tilesLoaded, this, &MapView::reloadMap);
 
 	_poi = poi;
@@ -119,8 +119,6 @@ MapView::MapView(Map *map, POI *poi, QWidget *parent) : QGraphicsView(parent)
 	_showPositionCoordinates = false;
 	_showMotionInfo = false;
 
-	_deviceRatio = 1.0;
-	_mapRatio = 1.0;
 	_opengl = false;
 	_plot = false;
 	_digitalZoom = 0;
@@ -247,7 +245,7 @@ void MapView::addWaypoints(const QVector<Waypoint> &waypoints)
 
 MapItem *MapView::addMap(MapAction *map)
 {
-	MapItem *mi = new MapItem(map, _map);
+	MapItem *mi = new MapItem(map, _map, _inputProjection);
 	mi->setColor(_palette.nextColor());
 	mi->setWidth(_areaWidth);
 	mi->setPenStyle(_areaStyle);
@@ -328,7 +326,7 @@ int MapView::fitMapZoom() const
 	RectC br = _tr | _rr | _wr | _ar;
 
 	return _map->zoomFit(viewport()->size() - QSize(2*MARGIN, 2*MARGIN),
-	  br.isNull() ? _map->llBounds() : br);
+	  br.isNull() ? _map->llBounds(_inputProjection) : br);
 }
 
 QPointF MapView::contentCenter() const
@@ -402,36 +400,18 @@ void MapView::setMap(Map *map)
 	  .intersected(_map->bounds()));
 	RectC cr(_map->xy2ll(vr.topLeft()), _map->xy2ll(vr.bottomRight()));
 
-	_map->unload();
 	disconnect(_map, &Map::tilesLoaded, this, &MapView::reloadMap);
+	_map->unload();
 
 	_map = map;
-	_map->load();
-	_map->setOutputProjection(_outputProjection);
-	_map->setInputProjection(_inputProjection);
-	_map->setDevicePixelRatio(_deviceRatio, _mapRatio);
+	_map->load(_inputProjection, _outputProjection, _deviceRatio, _hidpi);
 	connect(_map, &Map::tilesLoaded, this, &MapView::reloadMap);
 
 	digitalZoom(0);
 
 	_map->zoomFit(viewport()->rect().size(), cr);
-	_scene->setSceneRect(_map->bounds());
 
-	for (int i = 0; i < _tracks.size(); i++)
-		_tracks.at(i)->setMap(_map);
-	for (int i = 0; i < _routes.size(); i++)
-		_routes.at(i)->setMap(_map);
-	for (int i = 0; i < _areas.size(); i++)
-		_areas.at(i)->setMap(_map);
-	for (int i = 0; i < _waypoints.size(); i++)
-		_waypoints.at(i)->setMap(_map);
-
-	for (POIHash::const_iterator it = _pois.constBegin();
-	  it != _pois.constEnd(); it++)
-		it.value()->setMap(_map);
-	updatePOIVisibility();
-
-	_crosshair->setMap(_map);
+	rescale();
 
 	QPointF nc = QRectF(_map->ll2xy(cr.topLeft()),
 	  _map->ll2xy(cr.bottomRight())).center();
@@ -702,8 +682,9 @@ void MapView::plot(QPainter *painter, const QRectF &target, qreal scale,
   PlotFlags flags)
 {
 	QRect orig, adj;
-	qreal mapRatio, ratio, diff, q, p;
+	qreal ratio, diff, q, p;
 	QPointF scenePos, scalePos, posPos, motionPos;
+	bool hidpi = _hidpi && _deviceRatio > 1.0;
 	int zoom;
 
 
@@ -728,8 +709,8 @@ void MapView::plot(QPainter *painter, const QRectF &target, qreal scale,
 	}
 
 	// Expand the view if plotting into a bitmap
-	mapRatio = _mapRatio;
-	setDevicePixelRatio(_deviceRatio, 1.0);
+	if (hidpi)
+		setHidpi(false);
 
 	if (flags & Expand) {
 		qreal xdiff = (target.width() - adj.width()) / 2.0;
@@ -784,7 +765,8 @@ void MapView::plot(QPainter *painter, const QRectF &target, qreal scale,
 		centerOn(scenePos);
 	}
 
-	setDevicePixelRatio(_deviceRatio, mapRatio);
+	if (hidpi)
+		setHidpi(true);
 
 	_mapScale->setDigitalZoom(_digitalZoom);
 	_mapScale->setPos(scalePos);
@@ -1236,6 +1218,9 @@ bool MapView::gestureEvent(QGestureEvent *event)
 
 void MapView::useOpenGL(bool use)
 {
+	if (_opengl == use)
+		return;
+
 	_opengl = use;
 
 	if (use)
@@ -1286,60 +1271,21 @@ void MapView::reloadMap()
 	_scene->invalidate();
 }
 
-void MapView::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
+void MapView::setMapConfig(const Projection &in, const Projection &out,
+  bool hidpi)
 {
-	if (_deviceRatio == deviceRatio && _mapRatio == mapRatio)
-		return;
+	_inputProjection = in;
+	_outputProjection = out;
+	_hidpi = hidpi;
 
-	_deviceRatio = deviceRatio;
-	_mapRatio = mapRatio;
-
-	QRectF vr(mapToScene(viewport()->rect()).boundingRect()
-	  .intersected(_map->bounds()));
-	RectC cr(_map->xy2ll(vr.topLeft()), _map->xy2ll(vr.bottomRight()));
-
-	_map->setDevicePixelRatio(_deviceRatio, _mapRatio);
-	_scene->setSceneRect(_map->bounds());
-
-	for (int i = 0; i < _tracks.size(); i++)
-		_tracks.at(i)->setMap(_map);
-	for (int i = 0; i < _routes.size(); i++)
-		_routes.at(i)->setMap(_map);
-	for (int i = 0; i < _areas.size(); i++)
-		_areas.at(i)->setMap(_map);
-	for (int i = 0; i < _waypoints.size(); i++)
-		_waypoints.at(i)->setMap(_map);
-
-	for (POIHash::const_iterator it = _pois.constBegin();
-	  it != _pois.constEnd(); it++)
-		it.value()->setMap(_map);
-	updatePOIVisibility();
-
-	_crosshair->setMap(_map);
-
-	QPointF nc = QRectF(_map->ll2xy(cr.topLeft()),
-	  _map->ll2xy(cr.bottomRight())).center();
-	centerOn(nc);
-
-	reloadMap();
+	setMap(_map);
 }
 
-void MapView::setOutputProjection(const Projection &proj)
+void MapView::setDevicePixelRatio(qreal ratio)
 {
-	_outputProjection = proj;
-	Coordinates center = _map->xy2ll(mapToScene(viewport()->rect().center()));
-	_map->setOutputProjection(_outputProjection);
-	rescale();
-	centerOn(_map->ll2xy(center));
-}
+	_deviceRatio = ratio;
 
-void MapView::setInputProjection(const Projection &proj)
-{
-	_inputProjection = proj;
-	Coordinates center = _map->xy2ll(mapToScene(viewport()->rect().center()));
-	_map->setInputProjection(_inputProjection);
-	rescale();
-	centerOn(_map->ll2xy(center));
+	setMap(_map);
 }
 
 void MapView::fitContentToSize()
@@ -1436,3 +1382,20 @@ void MapView::drawInfoBackground(bool draw)
 	_positionCoordinates->drawBackground(draw);
 	_motionInfo->drawBackground(draw);
 }
+
+void MapView::setHidpi(bool hidpi)
+{
+	QRectF vr(mapToScene(viewport()->rect()).boundingRect()
+	  .intersected(_map->bounds()));
+	RectC cr(_map->xy2ll(vr.topLeft()), _map->xy2ll(vr.bottomRight()));
+
+	_map->unload();
+	_map->load(_inputProjection, _outputProjection, _deviceRatio, hidpi);
+	rescale();
+
+	QPointF nc = QRectF(_map->ll2xy(cr.topLeft()),
+	  _map->ll2xy(cr.bottomRight())).center();
+	centerOn(nc);
+
+	reloadMap();
+}
diff --git a/src/GUI/mapview.h b/src/GUI/mapview.h
index 9765aa08..dc74e95f 100644
--- a/src/GUI/mapview.h
+++ b/src/GUI/mapview.h
@@ -92,9 +92,8 @@ public:
 	void useAntiAliasing(bool use);
 	void setCoordinatesFormat(CoordinatesFormat format);
 	void setTimeZone(const QTimeZone &zone);
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-	void setOutputProjection(const Projection &proj);
-	void setInputProjection(const Projection &proj);
+	void setMapConfig(const Projection &in, const Projection &out, bool hidpi);
+	void setDevicePixelRatio(qreal ratio);
 	void clearMapCache();
 	void fitContentToSize();
 
@@ -156,6 +155,7 @@ private:
 	bool gestureEvent(QGestureEvent *event);
 	void pinchGesture(QPinchGesture *gesture);
 	void skipColor() {_palette.nextColor();}
+	void setHidpi(bool hidpi);
 
 	void mouseMoveEvent(QMouseEvent *event);
 	void mousePressEvent(QMouseEvent *event);
@@ -209,7 +209,7 @@ private:
 	QCursor _cursor;
 
 	qreal _deviceRatio;
-	qreal _mapRatio;
+	bool _hidpi;
 	bool _opengl;
 
 	int _pinchZoom;
diff --git a/src/map/aqmmap.cpp b/src/map/aqmmap.cpp
index dcd1b5e1..7226cde6 100644
--- a/src/map/aqmmap.cpp
+++ b/src/map/aqmmap.cpp
@@ -252,8 +252,13 @@ AQMMap::AQMMap(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-void AQMMap::load()
+void AQMMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 	_file.open(QIODevice::ReadOnly);
 }
 
@@ -305,12 +310,6 @@ int AQMMap::zoomOut()
 	return _zoom;
 }
 
-void AQMMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-	_mapRatio = mapRatio;
-}
-
 QPointF AQMMap::ll2xy(const Coordinates &c)
 {
 	const Zoom &z = _zooms.at(_zoom);
@@ -406,7 +405,7 @@ void AQMMap::drawTile(QPainter *painter, QPixmap &pixmap, QPointF &tp)
 	painter->drawPixmap(tp, pixmap);
 }
 
-Map *AQMMap::create(const QString &path, const Projection &, bool *isDir)
+Map *AQMMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/aqmmap.h b/src/map/aqmmap.h
index 467abfe6..46cb4e43 100644
--- a/src/map/aqmmap.h
+++ b/src/map/aqmmap.h
@@ -17,7 +17,7 @@ public:
 	QString name() const {return _name;}
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
@@ -26,9 +26,9 @@ public:
 	int zoomIn();
 	int zoomOut();
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	QPointF ll2xy(const Coordinates &c);
 	Coordinates xy2ll(const QPointF &p);
@@ -38,7 +38,7 @@ public:
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	struct File {
diff --git a/src/map/atlas.cpp b/src/map/atlas.cpp
index 973259ac..e683a77a 100644
--- a/src/map/atlas.cpp
+++ b/src/map/atlas.cpp
@@ -14,12 +14,7 @@
 
 static bool resCmp(OziMap *m1, OziMap *m2)
 {
-	qreal r1, r2;
-
-	r1 = m1->resolution(m1->bounds());
-	r2 = m2->resolution(m2->bounds());
-
-	return r1 > r2;
+	return m1->resolution(m1->bounds()) > m2->resolution(m2->bounds());
 }
 
 static bool xCmp(OziMap *m1, OziMap *m2)
@@ -38,7 +33,7 @@ void Atlas::computeZooms()
 
 	_zooms.append(Zoom(0, _maps.count() - 1));
 	for (int i = 1; i < _maps.count(); i++) {
-		qreal last = _maps.at(i-1)->resolution(_maps.at(i)->bounds());
+		qreal last = _maps.at(i-1)->resolution(_maps.at(i-1)->bounds());
 		qreal cur = _maps.at(i)->resolution(_maps.at(i)->bounds());
 		if (cur < last * ZOOM_THRESHOLD) {
 			_zooms.last().last = i-1;
@@ -136,18 +131,17 @@ Atlas::Atlas(const QString &fileName, bool TAR, QObject *parent)
 		return;
 	}
 
-	computeZooms();
-	computeBounds();
-
 	_valid = true;
 }
 
-void Atlas::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
+RectC Atlas::llBounds(const Projection &proj)
 {
-	for (int i = 0; i < _maps.size(); i++)
-		_maps[i]->setDevicePixelRatio(deviceRatio, mapRatio);
+	RectC bounds;
 
-	computeBounds();
+	for (int i = 0; i < _maps.size(); i++)
+		bounds |= _maps.at(i)->llBounds(proj);
+
+	return bounds;
 }
 
 QRectF Atlas::bounds()
@@ -277,20 +271,31 @@ void Atlas::draw(QPainter *painter, const QRectF &rect, int mapIndex,
 	const QPointF offset = _bounds.at(mapIndex).xy.topLeft();
 	QRectF pr = QRectF(rect.topLeft() - offset, rect.size());
 
-	map->load();
-
 	painter->translate(offset);
 	map->draw(painter, pr, flags);
 	painter->translate(-offset);
 }
 
+void Atlas::load(const Projection &in, const Projection &out, qreal deviceRatio,
+  bool hidpi)
+{
+	for (int i = 0; i < _maps.count(); i++)
+		_maps.at(i)->load(in, out, deviceRatio, hidpi);
+
+	computeZooms();
+	computeBounds();
+}
+
 void Atlas::unload()
 {
 	for (int i = 0; i < _maps.count(); i++)
 		_maps.at(i)->unload();
+
+	_zooms.clear();
+	_bounds.clear();
 }
 
-Map *Atlas::createTAR(const QString &path, const Projection &, bool *isDir)
+Map *Atlas::createTAR(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = true;
@@ -298,7 +303,7 @@ Map *Atlas::createTAR(const QString &path, const Projection &, bool *isDir)
 	return new Atlas(path, true);
 }
 
-Map *Atlas::createTBA(const QString &path, const Projection &, bool *isDir)
+Map *Atlas::createTBA(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = true;
diff --git a/src/map/atlas.h b/src/map/atlas.h
index b2f3428a..5a2306bc 100644
--- a/src/map/atlas.h
+++ b/src/map/atlas.h
@@ -3,6 +3,7 @@
 
 #include "map.h"
 #include "rectd.h"
+#include "projection.h"
 
 class OziMap;
 
@@ -16,6 +17,7 @@ public:
 	QString name() const {return _name;}
 
 	QRectF bounds();
+	RectC llBounds(const Projection &proj);
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -28,14 +30,15 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *createTAR(const QString &path, const Projection &, bool *isDir);
-	static Map *createTBA(const QString &path, const Projection &, bool *isDir);
+	static Map *createTAR(const QString &path, bool *isDir);
+	static Map *createTBA(const QString &path, bool *isDir);
 
 private:
 	struct Zoom {
diff --git a/src/map/bsbmap.cpp b/src/map/bsbmap.cpp
index 57a1340b..f7a4b18e 100644
--- a/src/map/bsbmap.cpp
+++ b/src/map/bsbmap.cpp
@@ -390,7 +390,7 @@ QImage BSBMap::readImage()
 }
 
 BSBMap::BSBMap(const QString &fileName, QObject *parent)
-  : Map(fileName, parent), _img(0), _ratio(1.0), _dataOffset(-1), _valid(false)
+  : Map(fileName, parent), _img(0), _mapRatio(1.0), _dataOffset(-1), _valid(false)
 {
 	QFile file(fileName);
 
@@ -414,19 +414,19 @@ BSBMap::~BSBMap()
 
 QPointF BSBMap::ll2xy(const Coordinates &c)
 {
-	return QPointF(_transform.proj2img(_projection.ll2xy(c))) / _ratio;
+	return QPointF(_transform.proj2img(_projection.ll2xy(c))) / _mapRatio;
 }
 
 Coordinates BSBMap::xy2ll(const QPointF &p)
 {
-	return _projection.xy2ll(_transform.img2proj(p * _ratio));
+	return _projection.xy2ll(_transform.img2proj(p * _mapRatio));
 }
 
 QRectF BSBMap::bounds()
 {
 	return _skewSize.isValid()
-	  ? QRectF(QPointF(0, 0), _skewSize / _ratio)
-	  : QRectF(QPointF(0, 0), _size / _ratio);
+	  ? QRectF(QPointF(0, 0), _skewSize / _mapRatio)
+	  : QRectF(QPointF(0, 0), _size / _mapRatio);
 }
 
 void BSBMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
@@ -435,17 +435,14 @@ void BSBMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 		_img->draw(painter, rect, flags);
 }
 
-void BSBMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
+void BSBMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
-	Q_UNUSED(deviceRatio);
+	Q_UNUSED(in);
+	Q_UNUSED(out);
 
-	_ratio = mapRatio;
-	if (_img)
-		_img->setDevicePixelRatio(_ratio);
-}
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 
-void BSBMap::load()
-{
 	if (!_img) {
 		if (_skew > 0.0 && _skew < 360.0) {
 			QTransform matrix;
@@ -454,6 +451,9 @@ void BSBMap::load()
 		} else
 			_img = new Image(readImage());
 	}
+
+	if (_img)
+		_img->setDevicePixelRatio(_mapRatio);
 }
 
 void BSBMap::unload()
@@ -462,7 +462,7 @@ void BSBMap::unload()
 	_img = 0;
 }
 
-Map *BSBMap::create(const QString &path, const Projection &, bool *isMap)
+Map *BSBMap::create(const QString &path, bool *isMap)
 {
 	if (isMap)
 		*isMap = false;
diff --git a/src/map/bsbmap.h b/src/map/bsbmap.h
index c2c8a640..b2db5afa 100644
--- a/src/map/bsbmap.h
+++ b/src/map/bsbmap.h
@@ -25,14 +25,14 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isMap);
+	static Map *create(const QString &path, bool *isMap);
 
 private:
 	bool parseBSB(const QByteArray &line);
@@ -56,7 +56,7 @@ private:
 	Image *_img;
 	QSize _size;
 	QSize _skewSize;
-	qreal _ratio;
+	qreal _mapRatio;
 	qint64 _dataOffset;
 	QVector<QRgb> _palette;
 
diff --git a/src/map/emptymap.h b/src/map/emptymap.h
index 1ba2d44f..ecfca06b 100644
--- a/src/map/emptymap.h
+++ b/src/map/emptymap.h
@@ -14,7 +14,7 @@ public:
 	QString name() const {return QString();}
 
 	QRectF bounds();
-	RectC llBounds() {return OSM::BOUNDS;}
+	RectC llBounds(const Projection &) {return OSM::BOUNDS;}
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
diff --git a/src/map/encmap.cpp b/src/map/encmap.cpp
index 00bd805d..bd92e766 100644
--- a/src/map/encmap.cpp
+++ b/src/map/encmap.cpp
@@ -22,9 +22,16 @@ ENCMap::ENCMap(const QString &fileName, QObject *parent)
 	}
 }
 
-void ENCMap::load()
+void ENCMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(hidpi);
+
+	_tileRatio = deviceRatio;
+	_projection = out;
 	_data.load();
+	QPixmapCache::clear();
 }
 
 void ENCMap::unload()
@@ -218,24 +225,7 @@ void ENCMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 	}
 }
 
-void ENCMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(mapRatio);
-
-	_tileRatio = deviceRatio;
-}
-
-void ENCMap::setOutputProjection(const Projection &projection)
-{
-	if (!projection.isValid() || projection == _projection)
-		return;
-
-	_projection = projection;
-	updateTransform();
-	QPixmapCache::clear();
-}
-
-Map *ENCMap::create(const QString &path, const Projection &, bool *isMap)
+Map *ENCMap::create(const QString &path, bool *isMap)
 {
 	if (isMap)
 		*isMap = false;
diff --git a/src/map/encmap.h b/src/map/encmap.h
index ddea3d41..6a469112 100644
--- a/src/map/encmap.h
+++ b/src/map/encmap.h
@@ -53,7 +53,7 @@ public:
 	QString name() const {return _data.name();}
 
 	QRectF bounds() {return _bounds;}
-	RectC llBounds() {return _llBounds;}
+	RectC llBounds(const Projection &) {return _llBounds;}
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -61,10 +61,9 @@ public:
 	int zoomIn();
 	int zoomOut();
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setOutputProjection(const Projection &projection);
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	QPointF ll2xy(const Coordinates &c)
 	  {return _transform.proj2img(_projection.ll2xy(c));}
@@ -76,7 +75,7 @@ public:
 	bool isValid() const {return _data.isValid();}
 	QString errorString() const {return _data.errorString();}
 
-	static Map *create(const QString &path, const Projection &, bool *isMap);
+	static Map *create(const QString &path, bool *isMap);
 
 private slots:
 	void jobFinished(ENCMapJob *job);
diff --git a/src/map/gemfmap.cpp b/src/map/gemfmap.cpp
index 7936c7bd..3af63c8b 100644
--- a/src/map/gemfmap.cpp
+++ b/src/map/gemfmap.cpp
@@ -182,8 +182,13 @@ Coordinates GEMFMap::xy2ll(const QPointF &p)
 	return OSM::m2ll(QPointF(p.x() * scale, -p.y() * scale) * _mapRatio);
 }
 
-void GEMFMap::load()
+void GEMFMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 	_file.open(QIODevice::ReadOnly);
 }
 
@@ -296,7 +301,7 @@ void GEMFMap::drawTile(QPainter *painter, QPixmap &pixmap, QPointF &tp)
 	painter->drawPixmap(tp, pixmap);
 }
 
-Map *GEMFMap::create(const QString &path, const Projection &, bool *isDir)
+Map *GEMFMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/gemfmap.h b/src/map/gemfmap.h
index ca16231a..9b82fe5e 100644
--- a/src/map/gemfmap.h
+++ b/src/map/gemfmap.h
@@ -14,7 +14,7 @@ public:
 	GEMFMap(const QString &fileName, QObject *parent = 0);
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 
 	int zoom() const {return _zi;}
 	void setZoom(int zoom) {_zi = zoom;}
@@ -26,18 +26,16 @@ public:
 	QPointF ll2xy(const Coordinates &c);
 	Coordinates xy2ll(const QPointF &p);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
-	  {_mapRatio = mapRatio;}
-
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	struct Region {
diff --git a/src/map/geotiffmap.cpp b/src/map/geotiffmap.cpp
index 59e4717f..6d139f0d 100644
--- a/src/map/geotiffmap.cpp
+++ b/src/map/geotiffmap.cpp
@@ -54,28 +54,26 @@ void GeoTIFFMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 		_img->draw(painter, rect, flags);
 }
 
-void GeoTIFFMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
+void GeoTIFFMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
-	Q_UNUSED(deviceRatio);
+	Q_UNUSED(in);
+	Q_UNUSED(out);
 
-	_ratio = mapRatio;
+	_ratio = hidpi ? deviceRatio : 1.0;
+
+	_img = new Image(path());
 	if (_img)
 		_img->setDevicePixelRatio(_ratio);
 }
 
-void GeoTIFFMap::load()
-{
-	if (!_img)
-		_img = new Image(path());
-}
-
 void GeoTIFFMap::unload()
 {
 	delete _img;
 	_img = 0;
 }
 
-Map *GeoTIFFMap::create(const QString &path, const Projection &, bool *isDir)
+Map *GeoTIFFMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/geotiffmap.h b/src/map/geotiffmap.h
index 44cef4e6..1bf0f33f 100644
--- a/src/map/geotiffmap.h
+++ b/src/map/geotiffmap.h
@@ -21,14 +21,15 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	Projection _projection;
diff --git a/src/map/imgmap.cpp b/src/map/imgmap.cpp
index 9733b3cf..28c18105 100644
--- a/src/map/imgmap.cpp
+++ b/src/map/imgmap.cpp
@@ -18,6 +18,21 @@ using namespace IMG;
 #define TILE_SIZE   384
 #define TEXT_EXTENT 160
 
+static RectC limitBounds(const RectC &bounds, const Projection &proj)
+{
+	/* Limit the bounds for some well known projections
+	   (world maps have N/S bounds up to 90/-90!) */
+
+	if (proj == PCS::pcs(3857) || proj == PCS::pcs(3395))
+		return bounds & OSM::BOUNDS;
+	else if (proj == PCS::pcs(3031) || proj == PCS::pcs(3976))
+		return bounds & RectC(Coordinates(-180, -60), Coordinates(180, -90));
+	else if (proj == PCS::pcs(3995) || proj == PCS::pcs(3413))
+		return bounds & RectC(Coordinates(-180, 90), Coordinates(180, 60));
+	else
+		return bounds;
+}
+
 static QList<MapData*> overlays(const QString &fileName)
 {
 	QList<MapData*> list;
@@ -56,17 +71,27 @@ IMGMap::IMGMap(const QString &fileName, bool GMAP, QObject *parent)
 		return;
 	}
 
-	_dataBounds = _data.first()->bounds() & OSM::BOUNDS;
 	_zoom = _data.first()->zooms().min();
-	updateTransform();
 
 	_valid = true;
 }
 
-void IMGMap::load()
+void IMGMap::load(const Projection &in, const Projection &out,
+  qreal devicelRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(hidpi);
+
+	_tileRatio = devicelRatio;
+	_projection = out;
+	_dataBounds = limitBounds(_data.first()->bounds(), _projection);
+
 	for (int i = 0; i < _data.size(); i++)
 		_data.at(i)->load();
+
+	updateTransform();
+
+	QPixmapCache::clear();
 }
 
 void IMGMap::unload()
@@ -261,37 +286,7 @@ void IMGMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 	}
 }
 
-void IMGMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(mapRatio);
-
-	_tileRatio = deviceRatio;
-}
-
-void IMGMap::setOutputProjection(const Projection &projection)
-{
-	if (!projection.isValid() || projection == _projection)
-		return;
-
-	_projection = projection;
-	// Limit the bounds for some well known projections
-	// (world maps have N/S bounds up to 90/-90!)
-	if (_projection == PCS::pcs(3857) || _projection == PCS::pcs(3395))
-		_dataBounds = _data.first()->bounds() & OSM::BOUNDS;
-	else if (_projection == PCS::pcs(3031) || _projection == PCS::pcs(3976))
-		_dataBounds = _data.first()->bounds() & RectC(Coordinates(-180, -60),
-		  Coordinates(180, -90));
-	else if (_projection == PCS::pcs(3995) || _projection == PCS::pcs(3413))
-		_dataBounds = _data.first()->bounds() & RectC(Coordinates(-180, 90),
-		  Coordinates(180, 60));
-	else
-		_dataBounds = _data.first()->bounds();
-
-	updateTransform();
-	QPixmapCache::clear();
-}
-
-Map* IMGMap::createIMG(const QString &path, const Projection &, bool *isDir)
+Map* IMGMap::createIMG(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
@@ -299,7 +294,7 @@ Map* IMGMap::createIMG(const QString &path, const Projection &, bool *isDir)
 	return new IMGMap(path, false);
 }
 
-Map* IMGMap::createGMAP(const QString &path, const Projection &, bool *isDir)
+Map* IMGMap::createGMAP(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = true;
diff --git a/src/map/imgmap.h b/src/map/imgmap.h
index e0357ac4..0a699669 100644
--- a/src/map/imgmap.h
+++ b/src/map/imgmap.h
@@ -55,7 +55,7 @@ public:
 	QString name() const {return _data.first()->name();}
 
 	QRectF bounds() {return _bounds;}
-	RectC llBounds() {return _dataBounds;}
+	RectC llBounds(const Projection &) {return _data.first()->bounds();}
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -70,17 +70,15 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setOutputProjection(const Projection &projection);
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-
-	void load();
+	void load(const Projection &in, const Projection &out, qreal devicelRatio,
+	  bool hidpi);
 	void unload();
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map* createIMG(const QString &path, const Projection &, bool *isDir);
-	static Map* createGMAP(const QString &path, const Projection &, bool *isDir);
+	static Map* createIMG(const QString &path, bool *isDir);
+	static Map* createGMAP(const QString &path, bool *isDir);
 
 private slots:
 	void jobFinished(IMGMapJob *job);
diff --git a/src/map/jnxmap.cpp b/src/map/jnxmap.cpp
index de598f01..95f706c1 100644
--- a/src/map/jnxmap.cpp
+++ b/src/map/jnxmap.cpp
@@ -11,22 +11,6 @@
 
 #define ic2dc(x) ((x) * 180.0 / 0x7FFFFFFF)
 
-struct Level {
-	quint32 count;
-	quint32 offset;
-	quint32 scale;
-};
-
-struct Ctx {
-	QPainter *painter;
-	QFile *file;
-	qreal ratio;
-
-	Ctx(QPainter *painter, QFile *file, qreal ratio)
-	  : painter(painter), file(file), ratio(ratio) {}
-};
-
-
 template<class T> bool JNXMap::readValue(T &val)
 {
 	T data;
@@ -53,7 +37,7 @@ bool JNXMap::readString(QByteArray& ba)
 	}
 }
 
-bool JNXMap::readTiles()
+bool JNXMap::readHeader()
 {
 	qint32 lat1, lon2, lat2, lon1;
 	quint32 version, dummy, levels;
@@ -88,16 +72,22 @@ bool JNXMap::readTiles()
 	}
 
 	_zooms.reserve(lh.size());
-	for (int i = 0; i < lh.count(); i++) {
-		_zooms.append(new Zoom());
-		Zoom *z = _zooms.last();
-		const Level &l = lh.at(i);
+	for (int i = 0; i < lh.count(); i++)
+		_zooms.append(new Zoom(lh.at(i)));
 
-		if (!_file.seek(l.offset))
+	return true;
+}
+
+bool JNXMap::readTiles()
+{
+	for (int i = 0; i < _zooms.size(); i++) {
+		Zoom *z = _zooms[i];
+
+		if (!_file.seek(z->level.offset))
 			return false;
 
-		z->tiles = QVector<Tile>(l.count);
-		for (quint32 j = 0; j < l.count; j++) {
+		z->tiles = QVector<Tile>(z->level.count);
+		for (quint32 j = 0; j < z->level.count; j++) {
 			Tile &tile = z->tiles[j];
 
 			if (!(readValue(tile.top) && readValue(tile.right)
@@ -134,16 +124,25 @@ bool JNXMap::readTiles()
 	return true;
 }
 
-JNXMap::JNXMap(const QString &fileName, const Projection &proj, QObject *parent)
-  : Map(fileName, parent), _file(fileName), _zoom(0), _projection(proj),
-  _mapRatio(1.0), _valid(false)
+void JNXMap::clearTiles()
+{
+	for (int i = 0; i < _zooms.size(); i++) {
+		Zoom *z = _zooms[i];
+		z->tiles.clear();
+		z->tree.RemoveAll();
+	}
+}
+
+JNXMap::JNXMap(const QString &fileName, QObject *parent)
+  : Map(fileName, parent), _file(fileName), _zoom(0), _mapRatio(1.0),
+  _valid(false)
 {
 	if (!_file.open(QIODevice::ReadOnly)) {
-		_errorString = fileName + ": " + _file.errorString();
+		_errorString = _file.errorString();
 		return;
 	}
 
-	if (!readTiles()) {
+	if (!readHeader()) {
 		_errorString = "JNX file format error";
 		return;
 	}
@@ -158,14 +157,22 @@ JNXMap::~JNXMap()
 	qDeleteAll(_zooms);
 }
 
-void JNXMap::load()
+void JNXMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
-	_file.open(QIODevice::ReadOnly);
+	Q_UNUSED(out);
+
+	_projection = in;
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+
+	if (_file.open(QIODevice::ReadOnly))
+		readTiles();
 }
 
 void JNXMap::unload()
 {
 	_file.close();
+	clearTiles();
 }
 
 QPointF JNXMap::ll2xy(const Coordinates &c)
@@ -267,51 +274,10 @@ void JNXMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 	tree.Search(min, max, cb, &ctx);
 }
 
-void JNXMap::setInputProjection(const Projection &projection)
-{
-	if (!projection.isValid() || projection == _projection)
-		return;
-
-	_projection = projection;
-
-	for (int i = 0; i < _zooms.size(); i++) {
-		Zoom *z = _zooms[i];
-
-		z->tree.RemoveAll();
-
-		for (int j = 0; j < z->tiles.size(); j++) {
-			Tile &tile = z->tiles[j];
-
-			RectC llrect(Coordinates(ic2dc(tile.left), ic2dc(tile.top)),
-			  Coordinates(ic2dc(tile.right), ic2dc(tile.bottom)));
-			RectD rect(_projection.ll2xy(llrect.topLeft()),
-			  _projection.ll2xy(llrect.bottomRight()));
-
-			if (j == 0) {
-				ReferencePoint tl(PointD(0, 0), rect.topLeft());
-				ReferencePoint br(PointD(tile.width, tile.height),
-				  rect.bottomRight());
-				z->transform = Transform(tl, br);
-			}
-
-			QRectF trect(z->transform.proj2img(rect.topLeft()),
-			  z->transform.proj2img(rect.bottomRight()));
-			tile.pos = trect.topLeft();
-
-			qreal min[2], max[2];
-			min[0] = trect.left();
-			min[1] = trect.top();
-			max[0] = trect.right();
-			max[1] = trect.bottom();
-			z->tree.Insert(min, max, &tile);
-		}
-	}
-}
-
-Map *JNXMap::create(const QString &path, const Projection &proj, bool *isDir)
+Map *JNXMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
 
-	return new JNXMap(path, proj);
+	return new JNXMap(path);
 }
diff --git a/src/map/jnxmap.h b/src/map/jnxmap.h
index 947c2584..46e20171 100644
--- a/src/map/jnxmap.h
+++ b/src/map/jnxmap.h
@@ -15,11 +15,11 @@ public:
 	Q_OBJECT
 
 public:
-	JNXMap(const QString &fileName, const Projection &proj, QObject *parent = 0);
+	JNXMap(const QString &fileName, QObject *parent = 0);
 	~JNXMap();
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom) {_zoom = zoom;}
@@ -30,19 +30,16 @@ public:
 	QPointF ll2xy(const Coordinates &c);
 	Coordinates xy2ll(const QPointF &p);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setInputProjection(const Projection &projection);
-	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
-	  {_mapRatio = mapRatio;}
-
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &proj, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	struct Tile {
@@ -54,15 +51,37 @@ private:
 		QPointF pos;
 	};
 
+	struct Level {
+		quint32 count;
+		quint32 offset;
+		quint32 scale;
+	};
+
 	struct Zoom {
+		Zoom() {}
+		Zoom(const Level &level) : level(level) {}
+
+		Level level;
 		Transform transform;
 		QVector<Tile> tiles;
 		RTree<Tile*, qreal, 2> tree;
 	};
 
+	struct Ctx {
+		QPainter *painter;
+		QFile *file;
+		qreal ratio;
+
+		Ctx(QPainter *painter, QFile *file, qreal ratio)
+		  : painter(painter), file(file), ratio(ratio) {}
+	};
+
+
 	template<class T> bool readValue(T &val);
 	bool readString(QByteArray &ba);
+	bool readHeader();
 	bool readTiles();
+	void clearTiles();
 
 	static bool cb(Tile *tile, void *context);
 	static QPixmap pixmap(const Tile *tile, QFile *file);
diff --git a/src/map/kmzmap.cpp b/src/map/kmzmap.cpp
index e5d2455e..e4e91378 100644
--- a/src/map/kmzmap.cpp
+++ b/src/map/kmzmap.cpp
@@ -13,14 +13,12 @@
 
 #include <QFileInfo>
 #include <QXmlStreamReader>
-#include <QImage>
-#include <QImageReader>
 #include <QBuffer>
+#include <QImageReader>
 #include <QPainter>
+#include <QPixmapCache>
 #include <private/qzipreader_p.h>
-#include"common/util.h"
-#include "pcs.h"
-#include "image.h"
+#include "common/util.h"
 #include "kmzmap.h"
 
 
@@ -29,162 +27,140 @@
 #define TL(m) ((m).bbox().topLeft())
 #define BR(m) ((m).bbox().bottomRight())
 
-
-KMZMap::Overlay::Overlay(const QString &path, const QSize &size,
-  const RectC &bbox, double rotation, const Projection *proj, qreal ratio)
-  : _path(path), _size(size), _bbox(bbox), _rotation(rotation), _img(0),
-  _proj(proj), _ratio(ratio)
+bool KMZMap::resCmp(const Tile &m1, const Tile &m2)
 {
-	ReferencePoint tl(PointD(0, 0), _proj->ll2xy(bbox.topLeft()));
-	ReferencePoint br(PointD(size.width(), size.height()),
-	  _proj->ll2xy(bbox.bottomRight()));
-
-	QTransform t;
-	t.rotate(-rotation);
-	QRectF b(0, 0, size.width(), size.height());
-	QPolygonF ma = t.map(b);
-	_bounds = ma.boundingRect();
-
-	_transform = Transform(tl, br);
+	return m1.resolution() > m2.resolution();
 }
 
-qreal KMZMap::Overlay::resolution(const QRectF &rect) const
-{
-	qreal cy = rect.center().y();
-	QPointF cl(rect.left(), cy);
-	QPointF cr(rect.right(), cy);
-
-	qreal ds = xy2ll(cl).distanceTo(xy2ll(cr));
-	qreal ps = QLineF(cl, cr).length();
-
-	return ds/ps;
-}
-
-void KMZMap::Overlay::draw(QPainter *painter, const QRectF &rect, Flags flags)
-{
-	if (_img) {
-		QRectF rr(rect.topLeft() / _ratio, rect.size());
-
-		if (_rotation) {
-			painter->save();
-			painter->rotate(-_rotation);
-			_img->draw(painter, rr, flags);
-			painter->restore();
-		} else
-			_img->draw(painter, rr, flags);
-	}
-
-	//painter->setPen(Qt::red);
-	//painter->drawRect(_bounds);
-}
-
-void KMZMap::Overlay::load(QZipReader *zip)
-{
-	if (!_img) {
-		QByteArray ba(zip->fileData(_path));
-		_img = new Image(QImage::fromData(ba));
-		_img->setDevicePixelRatio(_ratio);
-	}
-}
-
-void KMZMap::Overlay::unload()
-{
-	delete _img;
-	_img = 0;
-}
-
-void KMZMap::Overlay::setProjection(const Projection *proj)
-{
-	_proj = proj;
-
-	ReferencePoint tl(PointD(0, 0), _proj->ll2xy(_bbox.topLeft()));
-	ReferencePoint br(PointD(_size.width(), _size.height()),
-	  _proj->ll2xy(_bbox.bottomRight()));
-
-	QTransform t;
-	t.rotate(-_rotation);
-	QRectF b(0, 0, _size.width(), _size.height());
-	QPolygonF ma = t.map(b);
-	_bounds = ma.boundingRect();
-
-	_transform = Transform(tl, br);
-}
-
-void KMZMap::Overlay::setDevicePixelRatio(qreal ratio)
-{
-	_ratio = ratio;
-
-	if (_img)
-		_img->setDevicePixelRatio(_ratio);
-}
-
-
-bool KMZMap::resCmp(const Overlay &m1, const Overlay &m2)
-{
-	qreal r1, r2;
-
-	r1 = m1.resolution(m1.bounds());
-	r2 = m2.resolution(m2.bounds());
-
-	return r1 > r2;
-}
-
-bool KMZMap::xCmp(const Overlay &m1, const Overlay &m2)
+bool KMZMap::xCmp(const Tile &m1, const Tile &m2)
 {
 	return TL(m1).lon() < TL(m2).lon();
 }
 
-bool KMZMap::yCmp(const Overlay &m1, const Overlay &m2)
+bool KMZMap::yCmp(const Tile &m1, const Tile &m2)
 {
 	return TL(m1).lat() > TL(m2).lat();
 }
 
+
+KMZMap::Tile::Tile(const Overlay &overlay, QZipReader &zip)
+  : _overlay(overlay)
+{
+	QByteArray ba(zip.fileData(overlay.path()));
+	QBuffer img(&ba);
+	QImageReader ir(&img);
+	_size = ir.size();
+}
+
+void KMZMap::Tile::configure(const Projection &proj)
+{
+	ReferencePoint tl(PointD(0, 0), proj.ll2xy(bbox().topLeft()));
+	ReferencePoint br(PointD(_size.width(), _size.height()),
+	  proj.ll2xy(bbox().bottomRight()));
+	_transform = Transform(tl, br);
+}
+
+QRectF KMZMap::Tile::bounds() const
+{
+	QTransform t;
+	t.rotate(-rotation());
+	QRectF b(0, 0, _size.width(), _size.height());
+	QPolygonF ma(t.map(b));
+	return ma.boundingRect();
+}
+
+qreal KMZMap::Tile::resolution() const
+{
+	QRectF d(0, 0, _size.width(), _size.height());
+	qreal dy = d.center().y();
+	QPointF dl(d.left(), dy);
+	QPointF dr(d.right(), dy);
+
+	double cy = bbox().center().lat();
+	Coordinates cl(bbox().left(), cy);
+	Coordinates cr(bbox().right(), cy);
+
+	qreal ds = cl.distanceTo(cr);
+	qreal ps = QLineF(dl, dr).length();
+
+	return ds/ps;
+}
+
+bool KMZMap::createTiles(const QList<Overlay> &overlays, QZipReader &zip)
+{
+	if (overlays.isEmpty()) {
+		_errorString = "No usable overlay found";
+		return false;
+	}
+
+	_tiles.reserve(overlays.size());
+
+	for (int i = 0; i < overlays.size(); i++) {
+		const Overlay &ol = overlays.at(i);
+		Tile tile(ol, zip);
+		if (tile.isValid())
+			_tiles.append(tile);
+		else {
+			_errorString = ol.path() + ": invalid/missing overlay image";
+			return false;
+		}
+	}
+
+	return true;
+}
+
+void KMZMap::computeLLBounds()
+{
+	for (int i = 0; i < _tiles.size(); i++)
+		_llbounds |= _tiles.at(i).bbox();
+}
+
 void KMZMap::computeZooms()
 {
-	std::sort(_maps.begin(), _maps.end(), resCmp);
+	std::sort(_tiles.begin(), _tiles.end(), resCmp);
 
-	_zooms.append(Zoom(0, _maps.count() - 1));
-	for (int i = 1; i < _maps.count(); i++) {
-		qreal last = _maps.at(i-1).resolution(_maps.at(i).bounds());
-		qreal cur = _maps.at(i).resolution(_maps.at(i).bounds());
+	_zooms.append(Zoom(0, _tiles.count() - 1));
+	for (int i = 1; i < _tiles.count(); i++) {
+		qreal last = _tiles.at(i-1).resolution();
+		qreal cur = _tiles.at(i).resolution();
 		if (cur < last * ZOOM_THRESHOLD) {
 			_zooms.last().last = i-1;
-			_zooms.append(Zoom(i, _maps.count() - 1));
+			_zooms.append(Zoom(i, _tiles.count() - 1));
 		}
 	}
 }
 
 void KMZMap::computeBounds()
 {
-	QVector<QPointF> offsets(_maps.count());
+	QVector<QPointF> offsets(_tiles.count());
 
 	for (int z = 0; z < _zooms.count(); z++) {
-		QList<Overlay> m;
+		QList<Tile> m;
 		for (int i = _zooms.at(z).first; i <= _zooms.at(z).last; i++)
-			m.append(_maps.at(i));
+			m.append(_tiles.at(i));
 
 		std::sort(m.begin(), m.end(), xCmp);
-		offsets[_maps.indexOf(m.first())].setX(m.first().bounds().left());
+		offsets[_tiles.indexOf(m.first())].setX(m.first().bounds().left());
 		for (int i = 1; i < m.size(); i++) {
-			qreal w = m.first().ll2xy(TL(m.at(i))).x();
-			offsets[_maps.indexOf(m.at(i))].setX(w + m.at(i).bounds().left());
+			qreal w = ll2xy(TL(m.at(i)), m.first().transform()).x();
+			offsets[_tiles.indexOf(m.at(i))].setX(w + m.at(i).bounds().left());
 		}
 
 		std::sort(m.begin(), m.end(), yCmp);
-		offsets[_maps.indexOf(m.first())].setY(m.first().bounds().top());
+		offsets[_tiles.indexOf(m.first())].setY(m.first().bounds().top());
 		for (int i = 1; i < m.size(); i++) {
-			qreal h = m.first().ll2xy(TL(m.at(i))).y();
-			offsets[_maps.indexOf(m.at(i))].setY(h + m.at(i).bounds().top());
+			qreal h = ll2xy(TL(m.at(i)), m.first().transform()).y();
+			offsets[_tiles.indexOf(m.at(i))].setY(h + m.at(i).bounds().top());
 		}
 	}
 
 	_adjust = 0;
-	_bounds = QVector<Bounds>(_maps.count());
-	for (int i = 0; i < _maps.count(); i++) {
-		QRectF xy(offsets.at(i), _maps.at(i).bounds().size());
-		_bounds[i] = Bounds(_maps.at(i).bbox(), xy);
-		_adjust = qMin(qMin(_maps.at(i).bounds().left(),
-		  _maps.at(i).bounds().top()), _adjust);
+	_bounds = QVector<Bounds>(_tiles.count());
+	for (int i = 0; i < _tiles.count(); i++) {
+		QRectF xy(offsets.at(i), _tiles.at(i).bounds().size());
+		_bounds[i] = Bounds(_tiles.at(i).bbox(), xy);
+		_adjust = qMin(qMin(_tiles.at(i).bounds().left(),
+		  _tiles.at(i).bounds().top()), _adjust);
 	}
 	_adjust = -_adjust;
 }
@@ -236,7 +212,7 @@ RectC KMZMap::latLonBox(QXmlStreamReader &reader, double *rotation)
 	return RectC(Coordinates(left, top), Coordinates(right, bottom));
 }
 
-void KMZMap::groundOverlay(QXmlStreamReader &reader, QZipReader &zip)
+void KMZMap::groundOverlay(QXmlStreamReader &reader, QList<Overlay> &overlays)
 {
 	QString image;
 	RectC rect;
@@ -251,93 +227,87 @@ void KMZMap::groundOverlay(QXmlStreamReader &reader, QZipReader &zip)
 			reader.skipCurrentElement();
 	}
 
-	if (rect.isValid()) {
-		QByteArray ba(zip.fileData(image));
-		QBuffer img(&ba);
-		QImageReader ir(&img);
-		QSize size(ir.size());
-
-		if (size.isValid())
-			_maps.append(Overlay(image, size, rect, rotation, &_projection,
-			  _ratio));
-		else
-			reader.raiseError(image + ": Invalid image file");
-	} else
+	if (rect.isValid())
+		overlays.append(Overlay(image, rect, rotation));
+	else
 		reader.raiseError("Invalid LatLonBox");
 }
 
-void KMZMap::document(QXmlStreamReader &reader, QZipReader &zip)
+void KMZMap::document(QXmlStreamReader &reader, QList<Overlay> &overlays)
 {
 	while (reader.readNextStartElement()) {
 		if (reader.name() == QLatin1String("Document"))
-			document(reader, zip);
+			document(reader, overlays);
 		else if (reader.name() == QLatin1String("GroundOverlay"))
-			groundOverlay(reader, zip);
+			groundOverlay(reader, overlays);
 		else if (reader.name() == QLatin1String("Folder"))
-			folder(reader, zip);
+			folder(reader, overlays);
 		else
 			reader.skipCurrentElement();
 	}
 }
 
-void KMZMap::folder(QXmlStreamReader &reader, QZipReader &zip)
+void KMZMap::folder(QXmlStreamReader &reader, QList<Overlay> &overlays)
 {
 	while (reader.readNextStartElement()) {
 		if (reader.name() == QLatin1String("GroundOverlay"))
-			groundOverlay(reader, zip);
+			groundOverlay(reader, overlays);
 		else if (reader.name() == QLatin1String("Folder"))
-			folder(reader, zip);
+			folder(reader, overlays);
 		else
 			reader.skipCurrentElement();
 	}
 }
 
-void KMZMap::kml(QXmlStreamReader &reader, QZipReader &zip)
+void KMZMap::kml(QXmlStreamReader &reader, QList<Overlay> &overlays)
 {
 	while (reader.readNextStartElement()) {
 		if (reader.name() == QLatin1String("Document"))
-			document(reader, zip);
+			document(reader, overlays);
 		else if (reader.name() == QLatin1String("GroundOverlay"))
-			groundOverlay(reader, zip);
+			groundOverlay(reader, overlays);
 		else if (reader.name() == QLatin1String("Folder"))
-			folder(reader, zip);
+			folder(reader, overlays);
 		else
 			reader.skipCurrentElement();
 	}
 }
 
 
-KMZMap::KMZMap(const QString &fileName, const Projection &proj, QObject *parent)
-  : Map(fileName, parent), _zoom(0), _mapIndex(-1), _zip(0), _projection(proj),
-  _ratio(1.0), _valid(false)
+KMZMap::KMZMap(const QString &fileName, QObject *parent)
+  : Map(fileName, parent), _zoom(0), _mapIndex(-1), _zip(0), _mapRatio(1.0),
+  _valid(false)
 {
 	QZipReader zip(fileName, QIODevice::ReadOnly);
 	QByteArray xml(zip.fileData("doc.kml"));
 	QXmlStreamReader reader(xml);
+	QList<Overlay> overlays;
 
 	if (reader.readNextStartElement()) {
 		if (reader.name() == QLatin1String("kml"))
-			kml(reader, zip);
+			kml(reader, overlays);
 		else
 			reader.raiseError("Not a KMZ file");
 	}
-
 	if (reader.error()) {
 		_errorString = "doc.kml:" + QString::number(reader.lineNumber()) + ": "
 		  + reader.errorString();
 		return;
 	}
-	if (_maps.isEmpty()) {
-		_errorString = "No usable GroundOverlay found";
-		return;
-	}
 
+	if (!createTiles(overlays, zip))
+		return;
+	computeLLBounds();
 	computeZooms();
-	computeBounds();
 
 	_valid = true;
 }
 
+KMZMap::~KMZMap()
+{
+	delete _zip;
+}
+
 QRectF KMZMap::bounds()
 {
 	QRectF rect;
@@ -364,8 +334,9 @@ int KMZMap::zoomFit(const QSize &size, const RectC &br)
 			if (!_bounds.at(i).ll.contains(br.center()))
 				continue;
 
-			QRect sbr = QRectF(_maps.at(i).ll2xy(br.topLeft()),
-			  _maps.at(i).ll2xy(br.bottomRight())).toRect().normalized();
+			QRect sbr = QRectF(ll2xy(br.topLeft(), _tiles.at(i).transform()),
+			  ll2xy(br.bottomRight(), _tiles.at(i).transform()))
+			  .toRect().normalized();
 
 			if (sbr.size().width() > size.width()
 			  || sbr.size().height() > size.height())
@@ -413,10 +384,10 @@ QPointF KMZMap::ll2xy(const Coordinates &c)
 		}
 	}
 
-	QPointF p = _maps.at(_mapIndex).ll2xy(c);
-	if (_maps.at(_mapIndex).rotation()) {
+	QPointF p = ll2xy(c, _tiles.at(_mapIndex).transform());
+	if (_tiles.at(_mapIndex).rotation()) {
 		QTransform matrix;
-		matrix.rotate(-_maps.at(_mapIndex).rotation());
+		matrix.rotate(-_tiles.at(_mapIndex).rotation());
 		return matrix.map(p) + _bounds.at(_mapIndex).xy.topLeft();
 	} else
 		return p + _bounds.at(_mapIndex).xy.topLeft();
@@ -434,90 +405,90 @@ Coordinates KMZMap::xy2ll(const QPointF &p)
 	}
 
 	QPointF p2 = p - _bounds.at(idx).xy.topLeft();
-	if (_maps.at(idx).rotation()) {
+	if (_tiles.at(idx).rotation()) {
 		QTransform matrix;
-		matrix.rotate(_maps.at(idx).rotation());
-		return _maps.at(idx).xy2ll(matrix.map(p2));
+		matrix.rotate(_tiles.at(idx).rotation());
+		return xy2ll(matrix.map(p2), _tiles.at(idx).transform());
 	} else
-		return _maps.at(idx).xy2ll(p2);
+		return xy2ll(p2, _tiles.at(idx).transform());
 }
 
 void KMZMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 {
-	QRectF er = rect.adjusted(-_adjust * _ratio, -_adjust * _ratio,
-	  _adjust * _ratio, _adjust * _ratio);
+	Q_UNUSED(flags);
+
+	QRectF er = rect.adjusted(-_adjust * _mapRatio, -_adjust * _mapRatio,
+	  _adjust * _mapRatio, _adjust * _mapRatio);
 
 	for (int i = _zooms.at(_zoom).first; i <= _zooms.at(_zoom).last; i++) {
 		QRectF ir = er.intersected(_bounds.at(i).xy);
 		if (!ir.isNull())
-			draw(painter, ir, i, flags);
+			draw(painter, ir, i);
 	}
 }
 
-void KMZMap::load()
+void KMZMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(out);
+
+	_projection = in;
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+
+	for (int i = 0; i < _tiles.size(); i++)
+		_tiles[i].configure(_projection);
+
+	computeBounds();
+
 	Q_ASSERT(!_zip);
 	_zip = new QZipReader(path(), QIODevice::ReadOnly);
 }
 
 void KMZMap::unload()
 {
-	for (int i = 0; i < _maps.count(); i++)
-		_maps[i].unload();
+	_bounds.clear();
 
 	delete _zip;
 	_zip = 0;
 }
 
-void KMZMap::setInputProjection(const Projection &projection)
+void KMZMap::draw(QPainter *painter, const QRectF &rect, int mapIndex)
 {
-	if (!projection.isValid() || projection == _projection)
-		return;
-
-	_projection = projection;
-
-	for (int i = 0; i < _maps.size(); i++)
-		_maps[i].setProjection(&_projection);
-
-	_bounds.clear();
-	computeBounds();
-}
-
-void KMZMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-
-	if (mapRatio == _ratio)
-		return;
-
-	_ratio = mapRatio;
-
-	for (int i = 0; i < _maps.size(); i++)
-		_maps[i].setDevicePixelRatio(_ratio);
-
-	_bounds.clear();
-	computeBounds();
-}
-
-void KMZMap::draw(QPainter *painter, const QRectF &rect, int mapIndex,
-  Flags flags)
-{
-	Overlay &map = _maps[mapIndex];
+	const Tile &map = _tiles.at(mapIndex);
 	const QPointF offset = _bounds.at(mapIndex).xy.topLeft();
 	QRectF pr = QRectF(rect.topLeft() - offset, rect.size());
-
-	map.load(_zip);
+	QRectF sr(pr.topLeft() * _mapRatio, pr.size() * _mapRatio);
+	QString key(path() + "/" + map.path());
+	QPixmap pm;
 
 	painter->save();
 	painter->translate(offset);
-	map.draw(painter, pr, flags);
+	if (map.rotation())
+		painter->rotate(-map.rotation());
+
+	if (QPixmapCache::find(key, &pm)) {
+		pm.setDevicePixelRatio(_mapRatio);
+		painter->drawPixmap(pr.topLeft(), pm, sr);
+	} else {
+		QByteArray ba(_zip->fileData(map.path()));
+		QImage img(QImage::fromData(ba));
+		pm = QPixmap::fromImage(img);
+		pm.setDevicePixelRatio(_mapRatio);
+		painter->drawPixmap(pr.topLeft(), pm, sr);
+		QPixmapCache::insert(key, pm);
+		qDebug() << key;
+	}
+
+	//painter->setPen(Qt::red);
+	//painter->drawRect(map.bounds());
+
 	painter->restore();
 }
 
-Map *KMZMap::create(const QString &path, const Projection &proj, bool *isDir)
+Map *KMZMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
 
-	return new KMZMap(path, proj);
+	return new KMZMap(path);
 }
diff --git a/src/map/kmzmap.h b/src/map/kmzmap.h
index 155c6b40..c6d76473 100644
--- a/src/map/kmzmap.h
+++ b/src/map/kmzmap.h
@@ -1,6 +1,7 @@
 #ifndef KMZMAP_H
 #define KMZMAP_H
 
+#include <QImage>
 #include "projection.h"
 #include "transform.h"
 #include "rectd.h"
@@ -8,15 +9,16 @@
 
 class QXmlStreamReader;
 class QZipReader;
-class Image;
 
 class KMZMap : public Map
 {
 	Q_OBJECT
 
 public:
-	KMZMap(const QString &fileName, const Projection &proj, QObject *parent = 0);
+	KMZMap(const QString &fileName, QObject *parent = 0);
+	~KMZMap();
 
+	RectC llBounds(const Projection &) {return _llbounds;}
 	QRectF bounds();
 
 	int zoom() const {return _zoom;}
@@ -30,54 +32,52 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
-	void setInputProjection(const Projection &projection);
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &proj, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	class Overlay {
 	public:
-		Overlay(const QString &path, const QSize &size, const RectC &bbox,
-		  double rotation, const Projection *proj, qreal ratio);
-		bool operator==(const Overlay &other) const
-		  {return _path == other._path;}
-
-		QPointF ll2xy(const Coordinates &c) const
-		  {return QPointF(_transform.proj2img(_proj->ll2xy(c))) / _ratio;}
-		Coordinates xy2ll(const QPointF &p) const
-		  {return _proj->xy2ll(_transform.img2proj(p * _ratio));}
+		Overlay(const QString &path, const RectC &bbox, double rotation)
+		  : _path(path), _bbox(bbox), _rotation(rotation) {}
 
 		const QString &path() const {return _path;}
 		const RectC &bbox() const {return _bbox;}
-		const QRectF &bounds() const {return _bounds;}
-		qreal resolution(const QRectF &rect) const;
 		qreal rotation() const {return _rotation;}
 
-		void draw(QPainter *painter, const QRectF &rect, Flags flags);
-
-		void load(QZipReader *zip);
-		void unload();
-
-		void setProjection(const Projection *proj);
-		void setDevicePixelRatio(qreal ratio);
-
 	private:
 		QString _path;
-		QSize _size;
-		QRectF _bounds;
 		RectC _bbox;
 		qreal _rotation;
-		Image *_img;
-		const Projection *_proj;
+	};
+
+	class Tile {
+	public:
+		Tile(const Overlay &overlay, QZipReader &zip);
+
+		bool operator==(const Tile &other) const
+		  {return _overlay.path() == other._overlay.path();}
+
+		bool isValid() const {return _size.isValid();}
+		const QString &path() const {return _overlay.path();}
+		qreal rotation() const {return _overlay.rotation();}
+		const RectC &bbox() const {return _overlay.bbox();}
+		const Transform &transform() const {return _transform;}
+		QRectF bounds() const;
+		qreal resolution() const;
+
+		void configure(const Projection &proj);
+
+	private:
+		Overlay _overlay;
+		QSize _size;
 		Transform _transform;
-		qreal _ratio;
 	};
 
 	struct Zoom {
@@ -96,23 +96,32 @@ private:
 		Bounds(const RectC &ll, const QRectF &xy) : ll(ll), xy(xy) {}
 	};
 
-	void kml(QXmlStreamReader &reader, QZipReader &zip);
-	void document(QXmlStreamReader &reader, QZipReader &zip);
-	void folder(QXmlStreamReader &reader, QZipReader &zip);
-	void groundOverlay(QXmlStreamReader &reader, QZipReader &zip);
+	void kml(QXmlStreamReader &reader, QList<Overlay> &overlays);
+	void document(QXmlStreamReader &reader, QList<Overlay> &overlays);
+	void folder(QXmlStreamReader &reader, QList<Overlay> &overlays);
+	void groundOverlay(QXmlStreamReader &reader, QList<Overlay> &overlays);
 	RectC latLonBox(QXmlStreamReader &reader, double *rotation);
 	QString icon(QXmlStreamReader &reader);
 	double number(QXmlStreamReader &reader);
 
-	void draw(QPainter *painter, const QRectF &rect, int mapIndex, Flags flags);
+	void draw(QPainter *painter, const QRectF &rect, int mapIndex);
+
+	bool createTiles(const QList<Overlay> &overlays, QZipReader &zip);
 	void computeZooms();
 	void computeBounds();
+	void computeLLBounds();
 
-	static bool resCmp(const Overlay &m1, const Overlay &m2);
-	static bool xCmp(const Overlay &m1, const Overlay &m2);
-	static bool yCmp(const Overlay &m1, const Overlay &m2);
+	QPointF ll2xy(const Coordinates &c, const Transform &transform) const
+	  {return QPointF(transform.proj2img(_projection.ll2xy(c))) / _mapRatio;}
+	Coordinates xy2ll(const QPointF &p, const Transform &transform) const
+	  {return _projection.xy2ll(transform.img2proj(p * _mapRatio));}
 
-	QList<Overlay> _maps;
+	static bool resCmp(const Tile &m1, const Tile &m2);
+	static bool xCmp(const Tile &m1, const Tile &m2);
+	static bool yCmp(const Tile &m1, const Tile &m2);
+
+	RectC _llbounds;
+	QList<Tile> _tiles;
 	QVector<Zoom> _zooms;
 	QVector<Bounds> _bounds;
 	int _zoom;
@@ -120,7 +129,7 @@ private:
 	QZipReader *_zip;
 	qreal _adjust;
 	Projection _projection;
-	qreal _ratio;
+	qreal _mapRatio;
 
 	bool _valid;
 	QString _errorString;
diff --git a/src/map/map.cpp b/src/map/map.cpp
index 841f78b5..405bed7d 100644
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -37,8 +37,12 @@ void Map::growBottom(const QPointF &p, RectC &rect)
 		rect.setBottom(c.lat());
 }
 
-RectC Map::llBounds()
+RectC Map::llBounds(const Projection &proj)
 {
+	Q_UNUSED(proj);
+
+	/* We use bounds() and xy2ll() here as this fallback implementation is
+	   used ONLY for maps providing those functions since map creation. */
 	QRectF b(bounds());
 	double dx = b.width() / SAMPLES;
 	double dy = b.height() / SAMPLES;
diff --git a/src/map/map.h b/src/map/map.h
index 5281808f..1d1d7067 100644
--- a/src/map/map.h
+++ b/src/map/map.h
@@ -28,10 +28,19 @@ public:
 	  : QObject(parent), _path(path) {}
 	virtual ~Map() {}
 
+	/* Functions available since map creation */
 	const QString &path() const {return _path;}
 	virtual QString name() const {return Util::file2name(path());}
+	virtual RectC llBounds(const Projection &proj);
+
+	virtual bool isValid() const {return true;}
+	virtual bool isReady() const {return true;}
+	virtual QString errorString() const {return QString();}
+
+	/* Functions that shall be called after load() */
+	virtual void load(const Projection &, const Projection &, qreal, bool) {}
+	virtual void unload() {}
 
-	virtual RectC llBounds();
 	virtual QRectF bounds() = 0;
 	virtual qreal resolution(const QRectF &rect);
 
@@ -47,15 +56,6 @@ public:
 	virtual void draw(QPainter *painter, const QRectF &rect, Flags flags) = 0;
 
 	virtual void clearCache() {}
-	virtual void load() {}
-	virtual void unload() {}
-	virtual void setDevicePixelRatio(qreal, qreal) {}
-	virtual void setOutputProjection(const Projection &) {}
-	virtual void setInputProjection(const Projection &) {}
-
-	virtual bool isValid() const {return true;}
-	virtual bool isReady() const {return true;}
-	virtual QString errorString() const {return QString();}
 
 signals:
 	void tilesLoaded();
diff --git a/src/map/maplist.cpp b/src/map/maplist.cpp
index bf759d7c..fd684937 100644
--- a/src/map/maplist.cpp
+++ b/src/map/maplist.cpp
@@ -62,7 +62,7 @@ MapList::ParserMap MapList::parsers()
 
 MapList::ParserMap MapList::_parsers = parsers();
 
-Map *MapList::loadFile(const QString &path, const Projection &proj, bool *isDir)
+Map *MapList::loadFile(const QString &path, bool *isDir)
 {
 	ParserMap::iterator it;
 	QFileInfo fi(path);
@@ -73,7 +73,7 @@ Map *MapList::loadFile(const QString &path, const Projection &proj, bool *isDir)
 	if ((it = _parsers.find(suffix)) != _parsers.end()) {
 		while (it != _parsers.end() && it.key() == suffix) {
 			delete map;
-			map = it.value()(path, proj, isDir);
+			map = it.value()(path, isDir);
 			if (map->isValid())
 				return map;
 			else
@@ -82,7 +82,7 @@ Map *MapList::loadFile(const QString &path, const Projection &proj, bool *isDir)
 		}
 	} else {
 		for (it = _parsers.begin(); it != _parsers.end(); it++) {
-			map = it.value()(path, proj, isDir);
+			map = it.value()(path, isDir);
 			if (map->isValid())
 				return map;
 			else {
@@ -100,8 +100,7 @@ Map *MapList::loadFile(const QString &path, const Projection &proj, bool *isDir)
 	return map ? map : new InvalidMap(path, "Unknown file format");
 }
 
-TreeNode<Map *> MapList::loadDir(const QString &path, const Projection &proj,
-  TreeNode<Map *> *parent)
+TreeNode<Map*> MapList::loadDir(const QString &path, TreeNode<Map*> *parent)
 {
 	QDir md(path);
 	md.setFilter(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);
@@ -118,12 +117,12 @@ TreeNode<Map *> MapList::loadDir(const QString &path, const Projection &proj,
 		QString suffix = fi.suffix().toLower();
 
 		if (fi.isDir()) {
-			TreeNode<Map*> child(loadDir(fi.absoluteFilePath(), proj, &tree));
+			TreeNode<Map*> child(loadDir(fi.absoluteFilePath(), &tree));
 			if (!child.isEmpty())
 				tree.addChild(child);
 		} else if (filter().contains("*." + suffix)) {
 			bool isDir = false;
-			Map *map = loadFile(fi.absoluteFilePath(), proj, &isDir);
+			Map *map = loadFile(fi.absoluteFilePath(), &isDir);
 			if (isDir) {
 				if (parent)
 					parent->addItem(map);
@@ -138,13 +137,13 @@ TreeNode<Map *> MapList::loadDir(const QString &path, const Projection &proj,
 	return tree;
 }
 
-TreeNode<Map *> MapList::loadMaps(const QString &path, const Projection &proj)
+TreeNode<Map *> MapList::loadMaps(const QString &path)
 {
 	if (QFileInfo(path).isDir())
-		return loadDir(path, proj);
+		return loadDir(path);
 	else {
 		TreeNode<Map*> tree;
-		tree.addItem(loadFile(path, proj));
+		tree.addItem(loadFile(path));
 		return tree;
 	}
 }
diff --git a/src/map/maplist.h b/src/map/maplist.h
index 3bf8153c..8129b16a 100644
--- a/src/map/maplist.h
+++ b/src/map/maplist.h
@@ -10,18 +10,16 @@ class Projection;
 class MapList
 {
 public:
-	static TreeNode<Map*> loadMaps(const QString &path, const Projection &proj);
+	static TreeNode<Map*> loadMaps(const QString &path);
 	static QString formats();
 	static QStringList filter();
 
 private:
-	typedef Map*(*ParserCb)(const QString &, const Projection &, bool *isDir);
+	typedef Map*(*ParserCb)(const QString &, bool *isDir);
 	typedef QMultiMap<QString, ParserCb> ParserMap;
 
-	static Map *loadFile(const QString &path, const Projection &proj,
-	  bool *isDir = 0);
-	static TreeNode<Map*> loadDir(const QString &path, const Projection &proj,
-	  TreeNode<Map *> *parent = 0);
+	static Map *loadFile(const QString &path, bool *isDir = 0);
+	static TreeNode<Map*> loadDir(const QString &path, TreeNode<Map*> *parent = 0);
 
 	static ParserMap parsers();
 	static ParserMap _parsers;
diff --git a/src/map/mapsforgemap.cpp b/src/map/mapsforgemap.cpp
index a517184e..5849022a 100644
--- a/src/map/mapsforgemap.cpp
+++ b/src/map/mapsforgemap.cpp
@@ -15,16 +15,25 @@ MapsforgeMap::MapsforgeMap(const QString &fileName, QObject *parent)
   : Map(fileName, parent), _data(fileName), _zoom(0),
   _projection(PCS::pcs(3857)), _tileRatio(1.0)
 {
-	if (_data.isValid()) {
+	if (_data.isValid())
 		_zoom = _data.zooms().min();
-		updateTransform();
-	}
 }
 
-void MapsforgeMap::load()
+void MapsforgeMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(hidpi);
+
+	_tileRatio = deviceRatio;
+	_projection = out;
+
 	_data.load();
 	_style.load(_data, _tileRatio);
+
+	updateTransform();
+
+	QPixmapCache::clear();
 }
 
 void MapsforgeMap::unload()
@@ -225,24 +234,7 @@ void MapsforgeMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 	}
 }
 
-void MapsforgeMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(mapRatio);
-
-	_tileRatio = deviceRatio;
-}
-
-void MapsforgeMap::setOutputProjection(const Projection &projection)
-{
-	if (!projection.isValid() || projection == _projection)
-		return;
-
-	_projection = projection;
-	updateTransform();
-	QPixmapCache::clear();
-}
-
-Map *MapsforgeMap::create(const QString &path, const Projection &, bool *isMap)
+Map *MapsforgeMap::create(const QString &path, bool *isMap)
 {
 	if (isMap)
 		*isMap = false;
diff --git a/src/map/mapsforgemap.h b/src/map/mapsforgemap.h
index ba29f6f7..72169aa0 100644
--- a/src/map/mapsforgemap.h
+++ b/src/map/mapsforgemap.h
@@ -52,7 +52,7 @@ public:
 	MapsforgeMap(const QString &fileName, QObject *parent = 0);
 
 	QRectF bounds() {return _bounds;}
-	RectC llBounds() {return _data.bounds();}
+	RectC llBounds(const Projection &) {return _data.bounds();}
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -60,10 +60,9 @@ public:
 	int zoomIn();
 	int zoomOut();
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setOutputProjection(const Projection &projection);
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	QPointF ll2xy(const Coordinates &c)
 	  {return _transform.proj2img(_projection.ll2xy(c));}
@@ -75,7 +74,7 @@ public:
 	bool isValid() const {return _data.isValid();}
 	QString errorString() const {return _data.errorString();}
 
-	static Map *create(const QString &path, const Projection &, bool *isMap);
+	static Map *create(const QString &path, bool *isMap);
 
 private slots:
 	void jobFinished(MapsforgeMapJob *job);
diff --git a/src/map/mapsource.cpp b/src/map/mapsource.cpp
index dbf08db6..d5dd8dba 100644
--- a/src/map/mapsource.cpp
+++ b/src/map/mapsource.cpp
@@ -206,9 +206,8 @@ void MapSource::map(QXmlStreamReader &reader, Config &config)
 	}
 }
 
-Map *MapSource::create(const QString &path, const Projection &proj, bool *isDir)
+Map *MapSource::create(const QString &path, bool *isDir)
 {
-	Q_UNUSED(proj);
 	Config config;
 	QFile file(path);
 
diff --git a/src/map/mapsource.h b/src/map/mapsource.h
index 7c9d045e..1be457ee 100644
--- a/src/map/mapsource.h
+++ b/src/map/mapsource.h
@@ -15,7 +15,7 @@ class Projection;
 class MapSource
 {
 public:
-	static Map *create(const QString &path, const Projection &proj, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	enum Type {
diff --git a/src/map/mbtilesmap.cpp b/src/map/mbtilesmap.cpp
index a9cee8e4..9b5224c5 100644
--- a/src/map/mbtilesmap.cpp
+++ b/src/map/mbtilesmap.cpp
@@ -165,8 +165,19 @@ MBTilesMap::MBTilesMap(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-void MBTilesMap::load()
+void MBTilesMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+
+	if (_scalable) {
+		_scaledSize = _tileSize * deviceRatio;
+		_tileRatio = deviceRatio;
+	}
+
 	_db.open();
 }
 
@@ -218,16 +229,6 @@ int MBTilesMap::zoomOut()
 	return _zi;
 }
 
-void MBTilesMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	_mapRatio = mapRatio;
-
-	if (_scalable) {
-		_scaledSize = _tileSize * deviceRatio;
-		_tileRatio = deviceRatio;
-	}
-}
-
 qreal MBTilesMap::coordinatesRatio() const
 {
 	return _mapRatio > 1.0 ? _mapRatio / _tileRatio : 1.0;
@@ -337,7 +338,7 @@ Coordinates MBTilesMap::xy2ll(const QPointF &p)
 	  * coordinatesRatio());
 }
 
-Map *MBTilesMap::create(const QString &path, const Projection &, bool *isDir)
+Map *MBTilesMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/mbtilesmap.h b/src/map/mbtilesmap.h
index d7cf56ff..0b3a8b41 100644
--- a/src/map/mbtilesmap.h
+++ b/src/map/mbtilesmap.h
@@ -13,7 +13,7 @@ public:
 	QString name() const {return _name;}
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zi;}
@@ -27,14 +27,14 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	qreal tileSize() const;
diff --git a/src/map/onlinemap.cpp b/src/map/onlinemap.cpp
index 0d0e96cd..2746a414 100644
--- a/src/map/onlinemap.cpp
+++ b/src/map/onlinemap.cpp
@@ -13,8 +13,8 @@ OnlineMap::OnlineMap(const QString &fileName, const QString &name,
   const Authorization &authorization, int tileSize, bool scalable, bool invertY,
   bool quadTiles, QObject *parent)
     : Map(fileName, parent), _name(name), _zooms(zooms), _bounds(bounds),
-	_zoom(_zooms.max()), _mapRatio(1.0), _tileRatio(tileRatio),
-	_tileSize(tileSize), _scalable(scalable), _invertY(invertY)
+	_zoom(_zooms.max()), _tileSize(tileSize), _mapRatio(1.0),
+	_tileRatio(tileRatio), _scalable(scalable), _invertY(invertY)
 {
 	_tileLoader = new TileLoader(QDir(ProgramPaths::tilesDir()).filePath(_name),
 	  this);
@@ -70,9 +70,13 @@ int OnlineMap::zoomOut()
 	return _zoom;
 }
 
-void OnlineMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
+void OnlineMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
-	_mapRatio = mapRatio;
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 
 	if (_scalable) {
 		_tileLoader->setScaledSize(_tileSize * deviceRatio);
diff --git a/src/map/onlinemap.h b/src/map/onlinemap.h
index 83cd1b45..6ac36fd0 100644
--- a/src/map/onlinemap.h
+++ b/src/map/onlinemap.h
@@ -19,7 +19,7 @@ public:
 	QString name() const {return _name;}
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
@@ -33,7 +33,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void clearCache() {_tileLoader->clearCache();}
 
 private:
@@ -47,8 +48,8 @@ private:
 	Range _zooms;
 	RectC _bounds;
 	int _zoom;
-	qreal _mapRatio, _tileRatio;
 	int _tileSize;
+	qreal _mapRatio, _tileRatio;
 	bool _scalable;
 	bool _invertY;
 };
diff --git a/src/map/oruxmap.cpp b/src/map/oruxmap.cpp
index 1ecd2071..03653dea 100644
--- a/src/map/oruxmap.cpp
+++ b/src/map/oruxmap.cpp
@@ -487,8 +487,14 @@ int OruxMap::zoomOut()
 	return _zoom;
 }
 
-void OruxMap::load()
+void OruxMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+
 	if (_db.isValid())
 		_db.open();
 }
@@ -499,12 +505,6 @@ void OruxMap::unload()
 		_db.close();
 }
 
-void OruxMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-	_mapRatio = mapRatio;
-}
-
 QPixmap OruxMap::tile(const Zoom &z, int x, int y) const
 {
 	if (_db.isValid()) {
@@ -590,7 +590,7 @@ Coordinates OruxMap::xy2ll(const QPointF &p)
 	return z.projection.xy2ll(z.transform.img2proj(p * _mapRatio));
 }
 
-Map *OruxMap::create(const QString &path, const Projection &, bool *isDir)
+Map *OruxMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = true;
diff --git a/src/map/oruxmap.h b/src/map/oruxmap.h
index 71589345..fc3f36f7 100644
--- a/src/map/oruxmap.h
+++ b/src/map/oruxmap.h
@@ -33,14 +33,14 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	struct Zoom {
diff --git a/src/map/osmdroidmap.cpp b/src/map/osmdroidmap.cpp
index 67e7df7e..47fb0559 100644
--- a/src/map/osmdroidmap.cpp
+++ b/src/map/osmdroidmap.cpp
@@ -152,8 +152,13 @@ OsmdroidMap::OsmdroidMap(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-void OsmdroidMap::load()
+void OsmdroidMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 	_db.open();
 }
 
@@ -208,12 +213,6 @@ int OsmdroidMap::zoomOut()
 	return _zoom;
 }
 
-void OsmdroidMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-	_mapRatio = mapRatio;
-}
-
 qreal OsmdroidMap::tileSize() const
 {
 	return (_tileSize / _mapRatio);
@@ -310,7 +309,7 @@ Coordinates OsmdroidMap::xy2ll(const QPointF &p)
 	return OSM::m2ll(QPointF(p.x() * scale, -p.y() * scale) * _mapRatio);
 }
 
-Map *OsmdroidMap::create(const QString &path, const Projection &, bool *isDir)
+Map *OsmdroidMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/osmdroidmap.h b/src/map/osmdroidmap.h
index 7b7b913c..6344b2a0 100644
--- a/src/map/osmdroidmap.h
+++ b/src/map/osmdroidmap.h
@@ -11,7 +11,7 @@ public:
 	OsmdroidMap(const QString &fileName, QObject *parent = 0);
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
@@ -25,14 +25,14 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	int limitZoom(int zoom) const;
diff --git a/src/map/ozf.cpp b/src/map/ozf.cpp
index 7ff7499d..1cd68a44 100644
--- a/src/map/ozf.cpp
+++ b/src/map/ozf.cpp
@@ -182,6 +182,9 @@ bool OZF::open()
 	if (!_file.open(QIODevice::ReadOnly))
 		return false;
 
+	if (!_zooms.isEmpty())
+		return true;
+
 	if (!readHeaders()) {
 		qWarning("%s: Invalid header", qPrintable(_file.fileName()));
 		_file.close();
@@ -232,7 +235,6 @@ QPixmap OZF::tile(int zoom, int x, int y)
 
 QSize OZF::size(int zoom) const
 {
-	Q_ASSERT(_file.isOpen());
 	Q_ASSERT(0 <= zoom && zoom < _zooms.count());
 
 	return _zooms.at(zoom).size;
diff --git a/src/map/ozf.h b/src/map/ozf.h
index 9e46ee65..a7551dfd 100644
--- a/src/map/ozf.h
+++ b/src/map/ozf.h
@@ -16,6 +16,7 @@ public:
 	  _file(name) {}
 
 	bool open();
+	void close() {_file.close();}
 
 	QString fileName() const {return _file.fileName();}
 	bool isOpen() const {return _file.isOpen();}
diff --git a/src/map/ozimap.cpp b/src/map/ozimap.cpp
index dc6fea03..e72b40b2 100644
--- a/src/map/ozimap.cpp
+++ b/src/map/ozimap.cpp
@@ -50,6 +50,8 @@ OziMap::OziMap(const QString &fileName, bool TAR, QObject *parent)
 
 		if (!setTileInfo(_tar->files()))
 			return;
+
+		_tar->close();
 	} else {
 		QFile file(fileName);
 		MapFile mf(file);
@@ -105,6 +107,16 @@ OziMap::OziMap(const QString &fileName, Tar &tar, QObject *parent)
 	_transform = mf.transform();
 	_tar = new Tar(fi.absolutePath() + "/" + fi.completeBaseName() + ".tar");
 
+	if (!_tar->open()) {
+		_errorString = _tar->fileName() + ": error reading tar file";
+		return;
+	}
+	if (!setTileInfo(_tar->files())) {
+		_errorString = _tar->fileName() + ": " + _errorString;
+		return;
+	}
+	_tar->close();
+
 	_valid = true;
 }
 
@@ -144,6 +156,7 @@ bool OziMap::setImageInfo(const QString &path)
 			return false;
 		}
 		_scale = _ozf->scale(_zoom);
+		_ozf->close();
 	} else {
 		QImageReader ir(_map.path);
 		if (!ir.canRead()) {
@@ -192,28 +205,42 @@ bool OziMap::setTileInfo(const QStringList &tiles, const QString &path)
 	return false;
 }
 
-void OziMap::load()
+void OziMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
-	if (_tar && !_tar->isOpen()) {
-		if (!_tar->open()) {
-			qWarning("%s: error loading tar file",
-			  qPrintable(_tar->fileName()));
-			return;
-		}
-		if (!setTileInfo(_tar->files()))
-			qWarning("%s: %s", qPrintable(_tar->fileName()),
-			  qPrintable(_errorString));
-		return;
-	}
+	Q_UNUSED(in);
+	Q_UNUSED(out);
 
-	if (!_tile.isValid() && !_ozf && !_img)
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+
+	if (_tar) {
+		Q_ASSERT(!_tar->isOpen());
+		if (!_tar->open())
+			return;
+	}
+	if (_ozf) {
+		Q_ASSERT(!_ozf->isOpen());
+		if (!_ozf->open())
+			return;
+	}
+	if (!_tile.isValid() && !_ozf) {
+		Q_ASSERT(!_img);
 		_img = new Image(_map.path);
+		if (_img)
+			_img->setDevicePixelRatio(_mapRatio);
+	}
 }
 
 void OziMap::unload()
 {
 	delete _img;
 	_img = 0;
+
+	if (_tar && _tar->isOpen())
+		_tar->close();
+
+	if (_ozf && _ozf->isOpen())
+		_ozf->close();
 }
 
 void OziMap::drawTiled(QPainter *painter, const QRectF &rect) const
@@ -368,16 +395,7 @@ void OziMap::rescale(int zoom)
 	_scale = _ozf->scale(zoom);
 }
 
-void OziMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-
-	_mapRatio = mapRatio;
-	if (_img)
-		_img->setDevicePixelRatio(_mapRatio);
-}
-
-Map *OziMap::createTAR(const QString &path, const Projection &, bool *isDir)
+Map *OziMap::createTAR(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
@@ -385,7 +403,7 @@ Map *OziMap::createTAR(const QString &path, const Projection &, bool *isDir)
 	return new OziMap(path, true);
 }
 
-Map *OziMap::createMAP(const QString &path, const Projection &, bool *isDir)
+Map *OziMap::createMAP(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/ozimap.h b/src/map/ozimap.h
index 68b0a002..517ee97a 100644
--- a/src/map/ozimap.h
+++ b/src/map/ozimap.h
@@ -33,8 +33,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
 	bool isValid() const {return _valid;}
@@ -47,8 +47,8 @@ public:
 	QPointF pp2xy(const PointD &p) const
 	  {return _transform.proj2img(p) / _mapRatio;}
 
-	static Map *createTAR(const QString &path, const Projection &, bool *isDir);
-	static Map *createMAP(const QString &path, const Projection &, bool *isDir);
+	static Map *createTAR(const QString &path, bool *isDir);
+	static Map *createMAP(const QString &path, bool *isDir);
 
 private:
 	struct ImageInfo {
diff --git a/src/map/qctmap.cpp b/src/map/qctmap.cpp
index cebb70d7..be195cf8 100644
--- a/src/map/qctmap.cpp
+++ b/src/map/qctmap.cpp
@@ -354,8 +354,13 @@ QCTMap::QCTMap(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-void QCTMap::load()
+void QCTMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 	_file.open(QIODevice::ReadOnly);
 }
 
@@ -486,7 +491,7 @@ void QCTMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 	}
 }
 
-Map *QCTMap::create(const QString &path, const Projection &, bool *isDir)
+Map *QCTMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/qctmap.h b/src/map/qctmap.h
index a29bf728..f2e1b498 100644
--- a/src/map/qctmap.h
+++ b/src/map/qctmap.h
@@ -21,16 +21,14 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
-	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
-	  {_mapRatio = mapRatio;}
-
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	bool readName(QDataStream &stream);
diff --git a/src/map/rmap.cpp b/src/map/rmap.cpp
index ee3fcf0b..69bd2be8 100644
--- a/src/map/rmap.cpp
+++ b/src/map/rmap.cpp
@@ -355,8 +355,13 @@ Coordinates RMap::xy2ll(const QPointF &p)
 	  p.y() / scale.y()) * _mapRatio));
 }
 
-void RMap::load()
+void RMap::load(const Projection &in, const Projection &out, qreal deviceRatio,
+  bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 	_file.open(QIODevice::ReadOnly);
 }
 
@@ -455,13 +460,7 @@ void RMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 	}
 }
 
-void RMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-	_mapRatio = mapRatio;
-}
-
-Map *RMap::create(const QString &path, const Projection &, bool *isDir)
+Map *RMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/rmap.h b/src/map/rmap.h
index 7eed061f..fe02ac15 100644
--- a/src/map/rmap.h
+++ b/src/map/rmap.h
@@ -25,8 +25,8 @@ public:
 	QPointF ll2xy(const Coordinates &c);
 	Coordinates xy2ll(const QPointF &p);
 
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
@@ -34,7 +34,7 @@ public:
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	struct Header {
diff --git a/src/map/sqlitemap.cpp b/src/map/sqlitemap.cpp
index b35dc1d0..6f7f4878 100644
--- a/src/map/sqlitemap.cpp
+++ b/src/map/sqlitemap.cpp
@@ -100,8 +100,13 @@ SqliteMap::SqliteMap(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-void SqliteMap::load()
+void SqliteMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
 	_db.open();
 }
 
@@ -156,12 +161,6 @@ int SqliteMap::zoomOut()
 	return _zoom;
 }
 
-void SqliteMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
-{
-	Q_UNUSED(deviceRatio);
-	_mapRatio = mapRatio;
-}
-
 qreal SqliteMap::tileSize() const
 {
 	return (_tileSize / _mapRatio);
@@ -257,7 +256,7 @@ Coordinates SqliteMap::xy2ll(const QPointF &p)
 	return OSM::m2ll(QPointF(p.x() * scale, -p.y() * scale) * _mapRatio);
 }
 
-Map *SqliteMap::create(const QString &path, const Projection &, bool *isDir)
+Map *SqliteMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
diff --git a/src/map/sqlitemap.h b/src/map/sqlitemap.h
index 99285304..67328fbe 100644
--- a/src/map/sqlitemap.h
+++ b/src/map/sqlitemap.h
@@ -11,7 +11,7 @@ public:
 	SqliteMap(const QString &fileName, QObject *parent = 0);
 
 	QRectF bounds();
-	RectC llBounds() {return _bounds;}
+	RectC llBounds(const Projection &) {return _bounds;}
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
@@ -25,14 +25,14 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	int limitZoom(int zoom) const;
diff --git a/src/map/tar.cpp b/src/map/tar.cpp
index 0ed8e1d9..d1a10508 100644
--- a/src/map/tar.cpp
+++ b/src/map/tar.cpp
@@ -49,6 +49,9 @@ bool Tar::open()
 	if (!_file.open(QIODevice::ReadOnly))
 		return false;
 
+	if (!_index.isEmpty())
+		return true;
+
 	QFileInfo fi(_file.fileName());
 	QString tmiPath = fi.path() + "/" + fi.completeBaseName() + ".tmi";
 
diff --git a/src/map/tar.h b/src/map/tar.h
index 03800659..54982eb4 100644
--- a/src/map/tar.h
+++ b/src/map/tar.h
@@ -11,6 +11,7 @@ public:
 	Tar(const QString &name) : _file(name) {}
 
 	bool open();
+	void close() {_file.close();}
 
 	QStringList files() const {return _index.keys();}
 	QByteArray file(const QString &name);
diff --git a/src/map/wmsmap.cpp b/src/map/wmsmap.cpp
index 053d9591..8147a73e 100644
--- a/src/map/wmsmap.cpp
+++ b/src/map/wmsmap.cpp
@@ -99,6 +99,15 @@ void WMSMap::wmsReady()
 	emit mapLoaded();
 }
 
+void WMSMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
+{
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+}
+
 void WMSMap::clearCache()
 {
 	_tileLoader->clearCache();
diff --git a/src/map/wmsmap.h b/src/map/wmsmap.h
index 909eafde..eb21a31e 100644
--- a/src/map/wmsmap.h
+++ b/src/map/wmsmap.h
@@ -20,7 +20,7 @@ public:
 	QString name() const {return _name;}
 
 	QRectF bounds();
-	RectC llBounds() {return _wms->bbox();}
+	RectC llBounds(const Projection &) {return _wms->bbox();}
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -33,8 +33,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
-	  {_mapRatio = mapRatio;}
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void clearCache();
 
 	bool isReady() const {return _wms->isReady();}
diff --git a/src/map/wmtsmap.cpp b/src/map/wmtsmap.cpp
index 7896fbb3..1da2dd29 100644
--- a/src/map/wmtsmap.cpp
+++ b/src/map/wmtsmap.cpp
@@ -44,6 +44,15 @@ void WMTSMap::wmtsReady()
 	emit mapLoaded();
 }
 
+void WMTSMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
+{
+	Q_UNUSED(in);
+	Q_UNUSED(out);
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+}
+
 void WMTSMap::clearCache()
 {
 	_tileLoader->clearCache();
@@ -97,7 +106,7 @@ QRectF WMTSMap::bounds()
 	return lb.isValid() ? lb & tb : tb;
 }
 
-RectC WMTSMap::llBounds()
+RectC WMTSMap::llBounds(const Projection &)
 {
 	if (_wmts->bbox().isValid())
 		return _wmts->bbox();
diff --git a/src/map/wmtsmap.h b/src/map/wmtsmap.h
index 4b23c7e2..68af58c0 100644
--- a/src/map/wmtsmap.h
+++ b/src/map/wmtsmap.h
@@ -20,7 +20,7 @@ public:
 	QString name() const {return _name;}
 
 	QRectF bounds();
-	RectC llBounds();
+	RectC llBounds(const Projection &);
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -33,8 +33,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
-	  {_mapRatio = mapRatio;}
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void clearCache();
 
 	bool isReady() const {return _wmts->isReady();}
diff --git a/src/map/worldfilemap.cpp b/src/map/worldfilemap.cpp
index 61b15d45..e5dcd572 100644
--- a/src/map/worldfilemap.cpp
+++ b/src/map/worldfilemap.cpp
@@ -9,9 +9,8 @@
 #include "worldfilemap.h"
 
 
-WorldFileMap::WorldFileMap(const QString &fileName, const Projection &proj,
-  QObject *parent) : Map(fileName, parent), _projection(proj), _img(0),
-  _ratio(1.0), _hasPRJ(false), _valid(false)
+WorldFileMap::WorldFileMap(const QString &fileName, QObject *parent)
+  : Map(fileName, parent), _img(0), _mapRatio(1.0), _hasPRJ(false), _valid(false)
 {
 	QFileInfo fi(fileName);
 	QDir dir(fi.absoluteDir());
@@ -74,17 +73,25 @@ WorldFileMap::~WorldFileMap()
 
 QPointF WorldFileMap::ll2xy(const Coordinates &c)
 {
-	return QPointF(_transform.proj2img(_projection.ll2xy(c))) / _ratio;
+	return QPointF(_transform.proj2img(_projection.ll2xy(c))) / _mapRatio;
 }
 
 Coordinates WorldFileMap::xy2ll(const QPointF &p)
 {
-	return _projection.xy2ll(_transform.img2proj(p * _ratio));
+	return _projection.xy2ll(_transform.img2proj(p * _mapRatio));
+}
+
+RectC WorldFileMap::llBounds(const Projection &proj)
+{
+	if (_projection.isNull())
+		_projection = proj;
+
+	return Map::llBounds(proj);
 }
 
 QRectF WorldFileMap::bounds()
 {
-	return QRectF(QPointF(0, 0), _size / _ratio);
+	return QRectF(QPointF(0, 0), _size / _mapRatio);
 }
 
 void WorldFileMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
@@ -93,19 +100,20 @@ void WorldFileMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 		_img->draw(painter, rect, flags);
 }
 
-void WorldFileMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
+void WorldFileMap::load(const Projection &in, const Projection &out,
+  qreal deviceRatio, bool hidpi)
 {
-	Q_UNUSED(deviceRatio);
+	Q_UNUSED(out);
 
-	_ratio = mapRatio;
+	if (!_hasPRJ)
+		_projection = in;
+
+	_mapRatio = hidpi ? deviceRatio : 1.0;
+
+	Q_ASSERT(!_img);
+	_img = new Image(_imgFile);
 	if (_img)
-		_img->setDevicePixelRatio(_ratio);
-}
-
-void WorldFileMap::load()
-{
-	if (!_img)
-		_img = new Image(_imgFile);
+		_img->setDevicePixelRatio(_mapRatio);
 }
 
 void WorldFileMap::unload()
@@ -114,19 +122,10 @@ void WorldFileMap::unload()
 	_img = 0;
 }
 
-void WorldFileMap::setInputProjection(const Projection &projection)
-{
-	if (_hasPRJ || !projection.isValid() || projection == _projection)
-		return;
-
-	_projection = projection;
-}
-
-Map *WorldFileMap::create(const QString &path, const Projection &proj,
-  bool *isDir)
+Map *WorldFileMap::create(const QString &path, bool *isDir)
 {
 	if (isDir)
 		*isDir = false;
 
-	return new WorldFileMap(path, proj);
+	return new WorldFileMap(path);
 }
diff --git a/src/map/worldfilemap.h b/src/map/worldfilemap.h
index 59ec3518..4de84397 100644
--- a/src/map/worldfilemap.h
+++ b/src/map/worldfilemap.h
@@ -12,32 +12,31 @@ class WorldFileMap : public Map
 	Q_OBJECT
 
 public:
-	WorldFileMap(const QString &fileName, const Projection &proj,
-	  QObject *parent = 0);
+	WorldFileMap(const QString &fileName, QObject *parent = 0);
 	~WorldFileMap();
 
+	RectC llBounds(const Projection &proj);
 	QRectF bounds();
 	QPointF ll2xy(const Coordinates &c);
 	Coordinates xy2ll(const QPointF &p);
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void load();
+	void load(const Projection &in, const Projection &out, qreal deviceRatio,
+	  bool hidpi);
 	void unload();
-	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
-	void setInputProjection(const Projection &projection);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
 
-	static Map *create(const QString &path, const Projection &proj, bool *isDir);
+	static Map *create(const QString &path, bool *isDir);
 
 private:
 	Projection _projection;
 	Transform _transform;
 	Image *_img;
 	QSize _size;
-	qreal _ratio;
+	qreal _mapRatio;
 	QString _imgFile;
 	bool _hasPRJ;