diff --git a/src/GUI/gui.cpp b/src/GUI/gui.cpp
index b9b3ac3e..2f037759 100644
--- a/src/GUI/gui.cpp
+++ b/src/GUI/gui.cpp
@@ -924,8 +924,8 @@ void GUI::openOptions()
 #endif // ENABLE_HTTP2
 #ifdef ENABLE_HIDPI
 	if (options.hidpiMap != _options.hidpiMap)
-		_mapView->setDevicePixelRatio(options.hidpiMap ? devicePixelRatioF()
-		  : 1.0);
+		_mapView->setDevicePixelRatio(devicePixelRatioF(),
+		  options.hidpiMap ? devicePixelRatioF() : 1.0);
 #endif // ENABLE_HIDPI
 
 	if (reload)
@@ -2047,7 +2047,8 @@ void GUI::readSettings()
 	if (_options.useOpenGL)
 		_mapView->useOpenGL(true);
 #ifdef ENABLE_HIDPI
-	_mapView->setDevicePixelRatio(_options.hidpiMap ? devicePixelRatioF() : 1.0);
+	_mapView->setDevicePixelRatio(devicePixelRatioF(),
+	  _options.hidpiMap ? devicePixelRatioF() : 1.0);
 #endif // ENABLE_HIDPI
 
 	for (int i = 0; i < _tabs.count(); i++) {
@@ -2130,7 +2131,8 @@ void GUI::show()
 void GUI::screenChanged(QScreen *screen)
 {
 #ifdef ENABLE_HIDPI
-	_mapView->setDevicePixelRatio(_options.hidpiMap ? devicePixelRatioF() : 1.0);
+	_mapView->setDevicePixelRatio(devicePixelRatioF(),
+	  _options.hidpiMap ? devicePixelRatioF() : 1.0);
 
 	disconnect(SIGNAL(logicalDotsPerInchChanged(qreal)), this,
 	  SLOT(logicalDotsPerInchChanged(qreal)));
@@ -2146,6 +2148,7 @@ void GUI::logicalDotsPerInchChanged(qreal dpi)
 	Q_UNUSED(dpi)
 
 #ifdef ENABLE_HIDPI
-	_mapView->setDevicePixelRatio(_options.hidpiMap ? devicePixelRatioF() : 1.0);
+	_mapView->setDevicePixelRatio(devicePixelRatioF(),
+	  _options.hidpiMap ? devicePixelRatioF() : 1.0);
 #endif // ENBLE_HIDPI
 }
diff --git a/src/GUI/mapview.cpp b/src/GUI/mapview.cpp
index 32eca89e..786a3444 100644
--- a/src/GUI/mapview.cpp
+++ b/src/GUI/mapview.cpp
@@ -73,7 +73,8 @@ MapView::MapView(Map *map, POI *poi, QWidget *parent)
 	_poiColor = Qt::black;
 
 #ifdef ENABLE_HIDPI
-	_ratio = 1.0;
+	_deviceRatio = 1.0;
+	_mapRatio = 1.0;
 #endif // ENABLE_HIDPI
 	_opengl = false;
 	_plot = false;
@@ -271,7 +272,7 @@ void MapView::setMap(Map *map)
 	_map = map;
 	_map->load();
 #ifdef ENABLE_HIDPI
-	_map->setDevicePixelRatio(_ratio);
+	_map->setDevicePixelRatio(_deviceRatio, _mapRatio);
 #endif // ENABLE_HIDPI
 	connect(_map, SIGNAL(loaded()), this, SLOT(reloadMap()));
 
@@ -506,7 +507,7 @@ void MapView::plot(QPainter *painter, const QRectF &target, qreal scale,
 	setUpdatesEnabled(false);
 	_plot = true;
 #ifdef ENABLE_HIDPI
-	_map->setDevicePixelRatio(1.0);
+	_map->setDevicePixelRatio(_deviceRatio, 1.0);
 #endif // ENABLE_HIDPI
 
 	// Compute sizes & ratios
@@ -567,7 +568,7 @@ void MapView::plot(QPainter *painter, const QRectF &target, qreal scale,
 
 	// Exit plot mode
 #ifdef ENABLE_HIDPI
-	_map->setDevicePixelRatio(_ratio);
+	_map->setDevicePixelRatio(_deviceRatio, _mapRatio);
 #endif // ENABLE_HIDPI
 	_plot = false;
 	setUpdatesEnabled(true);
@@ -845,19 +846,21 @@ void MapView::reloadMap()
 	_scene->invalidate();
 }
 
-void MapView::setDevicePixelRatio(qreal ratio)
+void MapView::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
 {
 #ifdef ENABLE_HIDPI
-	if (_ratio == ratio)
+	if (_deviceRatio == deviceRatio && _mapRatio == mapRatio)
 		return;
 
-	_ratio = ratio;
+	_deviceRatio = deviceRatio;
+	_mapRatio = mapRatio;
+	QPixmapCache::clear();
 
 	QRectF vr(mapToScene(viewport()->rect()).boundingRect()
 	  .intersected(_map->bounds()));
 	RectC cr(_map->xy2ll(vr.topLeft()), _map->xy2ll(vr.bottomRight()));
 
-	_map->setDevicePixelRatio(_ratio);
+	_map->setDevicePixelRatio(_deviceRatio, _mapRatio);
 	_scene->setSceneRect(_map->bounds());
 
 	for (int i = 0; i < _tracks.size(); i++)
diff --git a/src/GUI/mapview.h b/src/GUI/mapview.h
index 14fbcc1b..058d6a06 100644
--- a/src/GUI/mapview.h
+++ b/src/GUI/mapview.h
@@ -69,7 +69,7 @@ public slots:
 	void showRouteWaypoints(bool show);
 	void clearMapCache();
 	void setCoordinatesFormat(CoordinatesFormat format);
-	void setDevicePixelRatio(qreal ratio);
+	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 private slots:
 	void updatePOI();
@@ -140,7 +140,8 @@ private:
 	bool _plot;
 
 #ifdef ENABLE_HIDPI
-	qreal _ratio;
+	qreal _deviceRatio;
+	qreal _mapRatio;
 #endif // ENABLE_HIDPI
 	bool _opengl;
 };
diff --git a/src/map/atlas.cpp b/src/map/atlas.cpp
index 5e4e6458..872f3101 100644
--- a/src/map/atlas.cpp
+++ b/src/map/atlas.cpp
@@ -145,10 +145,10 @@ Atlas::Atlas(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-void Atlas::setDevicePixelRatio(qreal ratio)
+void Atlas::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
 {
 	for (int i = 0; i < _maps.size(); i++)
-		_maps[i]->setDevicePixelRatio(ratio);
+		_maps[i]->setDevicePixelRatio(deviceRatio, mapRatio);
 
 	computeBounds();
 }
diff --git a/src/map/atlas.h b/src/map/atlas.h
index 05b3f83f..3a10d2db 100644
--- a/src/map/atlas.h
+++ b/src/map/atlas.h
@@ -28,7 +28,7 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal ratio);
+	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 	void unload();
 
 	bool isValid() const {return _valid;}
diff --git a/src/map/geotiffmap.cpp b/src/map/geotiffmap.cpp
index 34a1d40f..7c3b54f7 100644
--- a/src/map/geotiffmap.cpp
+++ b/src/map/geotiffmap.cpp
@@ -61,9 +61,11 @@ void GeoTIFFMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 		_img->draw(painter, rect, flags);
 }
 
-void GeoTIFFMap::setDevicePixelRatio(qreal ratio)
+void GeoTIFFMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
 {
-	_ratio = ratio;
+	Q_UNUSED(deviceRatio);
+
+	_ratio = mapRatio;
 	if (_img)
 		_img->setDevicePixelRatio(_ratio);
 }
diff --git a/src/map/geotiffmap.h b/src/map/geotiffmap.h
index 1d6836bb..f6872613 100644
--- a/src/map/geotiffmap.h
+++ b/src/map/geotiffmap.h
@@ -25,7 +25,7 @@ public:
 
 	void load();
 	void unload();
-	void setDevicePixelRatio(qreal ratio);
+	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
diff --git a/src/map/jnxmap.cpp b/src/map/jnxmap.cpp
index 7970cca1..5faf5190 100644
--- a/src/map/jnxmap.cpp
+++ b/src/map/jnxmap.cpp
@@ -142,7 +142,7 @@ bool JNXMap::readTiles()
 }
 
 JNXMap::JNXMap(const QString &fileName, QObject *parent)
-  : Map(parent), _file(fileName), _zoom(0), _ratio(1.0), _valid(false)
+  : Map(parent), _file(fileName), _zoom(0), _mapRatio(1.0), _valid(false)
 {
 	_name = QFileInfo(fileName).fileName();
 
@@ -162,13 +162,13 @@ JNXMap::JNXMap(const QString &fileName, QObject *parent)
 QPointF JNXMap::ll2xy(const Coordinates &c)
 {
 	const Zoom &z = _zooms.at(_zoom);
-	return z.transform.proj2img(_projection.ll2xy(c)) / _ratio;
+	return z.transform.proj2img(_projection.ll2xy(c)) / _mapRatio;
 }
 
 Coordinates JNXMap::xy2ll(const QPointF &p)
 {
 	const Zoom &z = _zooms.at(_zoom);
-	return _projection.xy2ll(z.transform.img2proj(p * _ratio));
+	return _projection.xy2ll(z.transform.img2proj(p * _mapRatio));
 }
 
 QRectF JNXMap::bounds()
@@ -249,8 +249,8 @@ void JNXMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 {
 	Q_UNUSED(flags);
 	const RTree<Tile*, qreal, 2> &tree = _zooms.at(_zoom).tree;
-	Ctx ctx(painter, &_file, _ratio);
-	QRectF rr(rect.topLeft() * _ratio, rect.size() * _ratio);
+	Ctx ctx(painter, &_file, _mapRatio);
+	QRectF rr(rect.topLeft() * _mapRatio, rect.size() * _mapRatio);
 
 	qreal min[2], max[2];
 	min[0] = rr.left();
diff --git a/src/map/jnxmap.h b/src/map/jnxmap.h
index 7c9ca4a1..96623400 100644
--- a/src/map/jnxmap.h
+++ b/src/map/jnxmap.h
@@ -32,7 +32,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal ratio) {_ratio = ratio;}
+	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
+	  {_mapRatio = mapRatio;}
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
@@ -63,7 +64,7 @@ private:
 	int _zoom;
 	RectC _bounds;
 	Projection _projection;
-	qreal _ratio;
+	qreal _mapRatio;
 
 	bool _valid;
 	QString _errorString;
diff --git a/src/map/map.h b/src/map/map.h
index 3fd63370..f7944516 100644
--- a/src/map/map.h
+++ b/src/map/map.h
@@ -44,7 +44,7 @@ public:
 	virtual void clearCache() {}
 	virtual void load() {}
 	virtual void unload() {}
-	virtual void setDevicePixelRatio(qreal) {}
+	virtual void setDevicePixelRatio(qreal, qreal) {}
 
 	virtual bool isValid() const {return true;}
 	virtual QString errorString() const {return QString();}
diff --git a/src/map/mapsource.cpp b/src/map/mapsource.cpp
index 8695128b..2dc9f522 100644
--- a/src/map/mapsource.cpp
+++ b/src/map/mapsource.cpp
@@ -9,7 +9,8 @@
 
 
 MapSource::Config::Config() : type(OSM), zooms(OSM::ZOOMS), bounds(OSM::BOUNDS),
-  format("image/png"), rest(false), tileRatio(1.0), scalable(false) {}
+  format("image/png"), rest(false), tileRatio(1.0), tileSize(256),
+  scalable(false) {}
 
 
 static CoordinateSystem coordinateSystem(QXmlStreamReader &reader)
@@ -115,6 +116,7 @@ void MapSource::map(QXmlStreamReader &reader, Config &config)
 {
 	const QXmlStreamAttributes &attr = reader.attributes();
 	QStringRef type = attr.value("type");
+	bool res;
 
 	if (type == "WMTS")
 		config.type = WMTS;
@@ -168,8 +170,8 @@ void MapSource::map(QXmlStreamReader &reader, Config &config)
 			  attr.value("password").toString());
 			reader.skipCurrentElement();
 		} else if (reader.name() == "tilePixelRatio") {
+			// Legacy tilePixelRatio tag support
 #ifdef ENABLE_HIDPI
-			bool res;
 			qreal val = reader.readElementText().toDouble(&res);
 			if (!res)
 				reader.raiseError("Invalid tilePixelRatio");
@@ -178,10 +180,40 @@ void MapSource::map(QXmlStreamReader &reader, Config &config)
 #else // ENABLE_HIDPI
 			reader.raiseError("HiDPI maps not supported");
 #endif // ENABLE_HIDPI
-		} else if (reader.name() == "scalable") {
-			QString val = reader.readElementText().trimmed();
-			if (val == "true" || val == "1")
-				config.scalable = true;
+		} else if (reader.name() == "tile") {
+			QXmlStreamAttributes attr = reader.attributes();
+
+			if (attr.hasAttribute("size")) {
+				int size = attr.value("size").toString().toInt(&res);
+				if (!res || size < 0) {
+					reader.raiseError("Invalid tile size");
+					return;
+				} else
+					config.tileSize = size;
+			}
+			if (attr.hasAttribute("type")) {
+				if (attr.value("type") == "raster")
+					config.scalable = false;
+				else if (attr.value("type") == "vector")
+					config.scalable = true;
+				else {
+					reader.raiseError("Invalid tile type");
+					return;
+				}
+			}
+			if (attr.hasAttribute("pixelRatio")) {
+#ifdef ENABLE_HIDPI
+				qreal ratio = attr.value("pixelRatio").toString().toDouble(&res);
+				if (!res || ratio < 0) {
+					reader.raiseError("Invalid tile pixelRatio");
+					return;
+				} else
+					config.tileRatio = ratio;
+#else // ENABLE_HIDPI
+				reader.raiseError("HiDPI maps not supported");
+#endif // ENABLE_HIDPI
+			}
+
 		} else
 			reader.skipCurrentElement();
 	}
@@ -255,11 +287,11 @@ Map *MapSource::loadMap(const QString &path, QString &errorString)
 		case TMS:
 			return new OnlineMap(config.name, config.url, config.zooms,
 			  config.bounds, config.tileRatio, config.authorization,
-			  config.scalable, true);
+			  config.tileSize, config.scalable, true);
 		case OSM:
 			return new OnlineMap(config.name, config.url, config.zooms,
 			 config.bounds, config.tileRatio, config.authorization,
-			 config.scalable, false);
+			 config.tileSize, config.scalable, false);
 		default:
 			return 0;
 	}
diff --git a/src/map/mapsource.h b/src/map/mapsource.h
index 99520f33..cf1d2f2d 100644
--- a/src/map/mapsource.h
+++ b/src/map/mapsource.h
@@ -40,6 +40,7 @@ private:
 		QList<KV> dimensions;
 		Authorization authorization;
 		qreal tileRatio;
+		int tileSize;
 		bool scalable;
 
 		Config();
diff --git a/src/map/mbtilesmap.cpp b/src/map/mbtilesmap.cpp
index 55ad1ea7..b00fd17d 100644
--- a/src/map/mbtilesmap.cpp
+++ b/src/map/mbtilesmap.cpp
@@ -60,7 +60,7 @@ static double index2mercator(int index, int zoom)
 }
 
 MBTilesMap::MBTilesMap(const QString &fileName, QObject *parent)
-  : Map(parent), _fileName(fileName), _deviceRatio(1.0), _tileRatio(1.0),
+  : Map(parent), _fileName(fileName), _mapRatio(1.0), _tileRatio(1.0),
   _scalable(false), _scaledSize(0), _valid(false)
 {
 	_db = QSqlDatabase::addDatabase("QSQLITE", fileName);
@@ -133,7 +133,7 @@ MBTilesMap::MBTilesMap(const QString &fileName, QObject *parent)
 		QImageReader reader(&buffer);
 		QSize tileSize(reader.size());
 
-		if (tileSize.isNull() || tileSize.width() != tileSize.height()) {
+		if (!tileSize.isValid() || tileSize.width() != tileSize.height()) {
 			_errorString = "Unsupported/invalid tile images";
 			return;
 		}
@@ -233,24 +233,24 @@ int MBTilesMap::zoomOut()
 	return _zoom;
 }
 
-void MBTilesMap::setDevicePixelRatio(qreal ratio)
+void MBTilesMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
 {
-	_deviceRatio = ratio;
+	_mapRatio = mapRatio;
 
 	if (_scalable) {
-		_scaledSize = _tileSize * ratio;
-		_tileRatio = ratio;
+		_scaledSize = _tileSize * deviceRatio;
+		_tileRatio = deviceRatio;
 	}
 }
 
 qreal MBTilesMap::coordinatesRatio() const
 {
-	return _deviceRatio > 1.0 ? _deviceRatio / _tileRatio : 1.0;
+	return _mapRatio > 1.0 ? _mapRatio / _tileRatio : 1.0;
 }
 
 qreal MBTilesMap::imageRatio() const
 {
-	return _deviceRatio > 1.0 ? _deviceRatio : _tileRatio;
+	return _mapRatio > 1.0 ? _mapRatio : _tileRatio;
 }
 
 qreal MBTilesMap::tileSize() const
diff --git a/src/map/mbtilesmap.h b/src/map/mbtilesmap.h
index f8eefc96..7ce23899 100644
--- a/src/map/mbtilesmap.h
+++ b/src/map/mbtilesmap.h
@@ -29,7 +29,7 @@ public:
 
 	void load();
 	void unload();
-	void setDevicePixelRatio(qreal ratio);
+	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 
 	bool isValid() const {return _valid;}
 	QString errorString() const {return _errorString;}
@@ -49,7 +49,7 @@ private:
 	Range _zooms;
 	int _zoom;
 	int _tileSize;
-	qreal _deviceRatio, _tileRatio;
+	qreal _mapRatio, _tileRatio;
 	bool _scalable;
 	int _scaledSize;
 
diff --git a/src/map/onlinemap.cpp b/src/map/onlinemap.cpp
index 759b1cf3..968d890b 100644
--- a/src/map/onlinemap.cpp
+++ b/src/map/onlinemap.cpp
@@ -8,15 +8,13 @@
 #include "onlinemap.h"
 
 
-#define TILE_SIZE     256
-
 OnlineMap::OnlineMap(const QString &name, const QString &url,
   const Range &zooms, const RectC &bounds, qreal tileRatio,
-  const Authorization &authorization, bool scalable, bool invertY,
+  const Authorization &authorization, int tileSize, bool scalable, bool invertY,
   QObject *parent)
 	: Map(parent), _name(name), _zooms(zooms), _bounds(bounds),
-	_zoom(_zooms.max()), _deviceRatio(1.0), _tileRatio(tileRatio),
-	_scalable(scalable), _scaledSize(0), _invertY(invertY)
+	_zoom(_zooms.max()), _mapRatio(1.0), _tileRatio(tileRatio),
+	_tileSize(tileSize), _scalable(scalable), _invertY(invertY), _scaledSize(0)
 {
 	_tileLoader = new TileLoader(QDir(ProgramPaths::tilesDir()).filePath(_name),
 	  this);
@@ -48,7 +46,7 @@ int OnlineMap::zoomFit(const QSize &size, const RectC &rect)
 		QRectF tbr(OSM::ll2m(rect.topLeft()), OSM::ll2m(rect.bottomRight()));
 		QPointF sc(tbr.width() / size.width(), tbr.height() / size.height());
 		_zoom = limitZoom(OSM::scale2zoom(qMax(sc.x(), -sc.y())
-		  / coordinatesRatio(), TILE_SIZE));
+		  / coordinatesRatio(), _tileSize));
 	}
 
 	return _zoom;
@@ -56,7 +54,7 @@ int OnlineMap::zoomFit(const QSize &size, const RectC &rect)
 
 qreal OnlineMap::resolution(const QRectF &rect)
 {
-	return OSM::resolution(rect.center(), _zoom, TILE_SIZE);
+	return OSM::resolution(rect.center(), _zoom, _tileSize);
 }
 
 int OnlineMap::zoomIn()
@@ -71,34 +69,34 @@ int OnlineMap::zoomOut()
 	return _zoom;
 }
 
-void OnlineMap::setDevicePixelRatio(qreal ratio)
+void OnlineMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
 {
-	_deviceRatio = ratio;
+	_mapRatio = mapRatio;
 
 	if (_scalable) {
-		_scaledSize = TILE_SIZE * ratio;
-		_tileRatio = ratio;
+		_scaledSize = _tileSize * deviceRatio;
+		_tileRatio = deviceRatio;
 	}
 }
 
 qreal OnlineMap::coordinatesRatio() const
 {
-	return _deviceRatio > 1.0 ? _deviceRatio / _tileRatio : 1.0;
+	return _mapRatio > 1.0 ? _mapRatio / _tileRatio : 1.0;
 }
 
 qreal OnlineMap::imageRatio() const
 {
-	return _deviceRatio > 1.0 ? _deviceRatio : _tileRatio;
+	return _mapRatio > 1.0 ? _mapRatio : _tileRatio;
 }
 
 qreal OnlineMap::tileSize() const
 {
-	return (TILE_SIZE / coordinatesRatio());
+	return (_tileSize / coordinatesRatio());
 }
 
 void OnlineMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 {
-	qreal scale = OSM::zoom2scale(_zoom, TILE_SIZE);
+	qreal scale = OSM::zoom2scale(_zoom, _tileSize);
 
 	QPoint tile = OSM::mercator2tile(QPointF(rect.topLeft().x() * scale,
 	  -rect.topLeft().y() * scale) * coordinatesRatio(), _zoom);
@@ -138,14 +136,14 @@ void OnlineMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 
 QPointF OnlineMap::ll2xy(const Coordinates &c)
 {
-	qreal scale = OSM::zoom2scale(_zoom, TILE_SIZE);
+	qreal scale = OSM::zoom2scale(_zoom, _tileSize);
 	QPointF m = OSM::ll2m(c);
 	return QPointF(m.x() / scale, m.y() / -scale) / coordinatesRatio();
 }
 
 Coordinates OnlineMap::xy2ll(const QPointF &p)
 {
-	qreal scale = OSM::zoom2scale(_zoom, TILE_SIZE);
+	qreal scale = OSM::zoom2scale(_zoom, _tileSize);
 	return OSM::m2ll(QPointF(p.x() * scale, -p.y() * scale)
 	  * coordinatesRatio());
 }
diff --git a/src/map/onlinemap.h b/src/map/onlinemap.h
index 4ac0b6d7..01df9aca 100644
--- a/src/map/onlinemap.h
+++ b/src/map/onlinemap.h
@@ -13,7 +13,7 @@ class OnlineMap : public Map
 public:
 	OnlineMap(const QString &name, const QString &url, const Range &zooms,
 	  const RectC &bounds, qreal tileRatio, const Authorization &authorization,
-	  bool scalable, bool invertY, QObject *parent = 0);
+	  int tileSize, bool scalable, bool invertY, QObject *parent = 0);
 
 	QString name() const {return _name;}
 
@@ -31,7 +31,7 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal ratio);
+	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 	void clearCache() {_tileLoader->clearCache();}
 
 private:
@@ -45,10 +45,11 @@ private:
 	Range _zooms;
 	RectC _bounds;
 	int _zoom;
-	qreal _deviceRatio, _tileRatio;
+	qreal _mapRatio, _tileRatio;
+	int _tileSize;
 	bool _scalable;
-	int _scaledSize;
 	bool _invertY;
+	int _scaledSize;
 };
 
 #endif // ONLINEMAP_H
diff --git a/src/map/ozimap.cpp b/src/map/ozimap.cpp
index 7f5c5ac4..60240bfc 100644
--- a/src/map/ozimap.cpp
+++ b/src/map/ozimap.cpp
@@ -16,7 +16,7 @@
 
 
 OziMap::OziMap(const QString &fileName, QObject *parent)
-  : Map(parent), _img(0), _tar(0), _ozf(0), _zoom(0), _ratio(1.0), _valid(false)
+  : Map(parent), _img(0), _tar(0), _ozf(0), _zoom(0), _mapRatio(1.0), _valid(false)
 {
 	QFileInfo fi(fileName);
 	QString suffix = fi.suffix().toLower();
@@ -78,7 +78,7 @@ OziMap::OziMap(const QString &fileName, QObject *parent)
 }
 
 OziMap::OziMap(const QString &fileName, Tar &tar, QObject *parent)
-  : Map(parent), _img(0), _tar(0), _ozf(0), _zoom(0), _ratio(1.0), _valid(false)
+  : Map(parent), _img(0), _tar(0), _ozf(0), _zoom(0), _mapRatio(1.0), _valid(false)
 {
 	QFileInfo fi(fileName);
 	QFileInfo map(fi.absolutePath());
@@ -217,15 +217,15 @@ void OziMap::unload()
 
 void OziMap::drawTiled(QPainter *painter, const QRectF &rect) const
 {
-	QSizeF ts(_tile.size.width() / _ratio, _tile.size.height() / _ratio);
+	QSizeF ts(_tile.size.width() / _mapRatio, _tile.size.height() / _mapRatio);
 	QPointF tl(floor(rect.left() / ts.width()) * ts.width(),
 	  floor(rect.top() / ts.height()) * ts.height());
 
 	QSizeF s(rect.right() - tl.x(), rect.bottom() - tl.y());
 	for (int i = 0; i < ceil(s.width() / ts.width()); i++) {
 		for (int j = 0; j < ceil(s.height() / ts.height()); j++) {
-			int x = round(tl.x() * _ratio + i * _tile.size.width());
-			int y = round(tl.y() * _ratio + j * _tile.size.height());
+			int x = round(tl.x() * _mapRatio + i * _tile.size.width());
+			int y = round(tl.y() * _mapRatio + j * _tile.size.height());
 
 			QString tileName(_tile.path.arg(QString::number(x),
 			  QString::number(y)));
@@ -247,7 +247,7 @@ void OziMap::drawTiled(QPainter *painter, const QRectF &rect) const
 				  _tile.path.arg(QString::number(x), QString::number(y))));
 			else {
 #ifdef ENABLE_HIDPI
-				pixmap.setDevicePixelRatio(_ratio);
+				pixmap.setDevicePixelRatio(_mapRatio);
 #endif // ENABLE_HIDPI
 				QPointF tp(tl.x() + i * ts.width(), tl.y() + j * ts.height());
 				painter->drawPixmap(tp, pixmap);
@@ -258,16 +258,16 @@ void OziMap::drawTiled(QPainter *painter, const QRectF &rect) const
 
 void OziMap::drawOZF(QPainter *painter, const QRectF &rect) const
 {
-	QSizeF ts(_ozf->tileSize().width() / _ratio, _ozf->tileSize().height()
-	  / _ratio);
+	QSizeF ts(_ozf->tileSize().width() / _mapRatio, _ozf->tileSize().height()
+	  / _mapRatio);
 	QPointF tl(floor(rect.left() / ts.width()) * ts.width(),
 	  floor(rect.top() / ts.height()) * ts.height());
 
 	QSizeF s(rect.right() - tl.x(), rect.bottom() - tl.y());
 	for (int i = 0; i < ceil(s.width() / ts.width()); i++) {
 		for (int j = 0; j < ceil(s.height() / ts.height()); j++) {
-			int x = round(tl.x() * _ratio + i * _ozf->tileSize().width());
-			int y = round(tl.y() * _ratio + j * _ozf->tileSize().height());
+			int x = round(tl.x() * _mapRatio + i * _ozf->tileSize().width());
+			int y = round(tl.y() * _mapRatio + j * _ozf->tileSize().height());
 
 			QPixmap pixmap;
 			QString key = _ozf->fileName() + "/" + QString::number(_zoom) + "_"
@@ -282,7 +282,7 @@ void OziMap::drawOZF(QPainter *painter, const QRectF &rect) const
 				qWarning("%s: error loading tile image", qPrintable(key));
 			else {
 #ifdef ENABLE_HIDPI
-				pixmap.setDevicePixelRatio(_ratio);
+				pixmap.setDevicePixelRatio(_mapRatio);
 #endif // ENABLE_HIDPI
 				QPointF tp(tl.x() + i * ts.width(), tl.y() + j * ts.height());
 				painter->drawPixmap(tp, pixmap);
@@ -307,23 +307,23 @@ QPointF OziMap::ll2xy(const Coordinates &c)
 {
 	QPointF p(_transform.proj2img(_projection.ll2xy(c)));
 	return _ozf
-	  ? QPointF(p.x() * _scale.x(), p.y() * _scale.y()) / _ratio
-	  : p / _ratio;
+	  ? QPointF(p.x() * _scale.x(), p.y() * _scale.y()) / _mapRatio
+	  : p / _mapRatio;
 }
 
 Coordinates OziMap::xy2ll(const QPointF &p)
 {
 	return _ozf
 	  ? _projection.xy2ll(_transform.img2proj(QPointF(p.x() / _scale.x(),
-		p.y() / _scale.y()) * _ratio))
-	  : _projection.xy2ll(_transform.img2proj(p * _ratio));
+		p.y() / _scale.y()) * _mapRatio))
+	  : _projection.xy2ll(_transform.img2proj(p * _mapRatio));
 }
 
 QRectF OziMap::bounds()
 {
 	return _ozf
-	  ? QRectF(QPointF(0, 0), _ozf->size(_zoom) / _ratio)
-	  : QRectF(QPointF(0, 0), _map.size / _ratio);
+	  ? QRectF(QPointF(0, 0), _ozf->size(_zoom) / _mapRatio)
+	  : QRectF(QPointF(0, 0), _map.size / _mapRatio);
 }
 
 int OziMap::zoomFit(const QSize &size, const RectC &rect)
@@ -371,9 +371,11 @@ void OziMap::rescale(int zoom)
 	_scale = _ozf->scale(zoom);
 }
 
-void OziMap::setDevicePixelRatio(qreal ratio)
+void OziMap::setDevicePixelRatio(qreal deviceRatio, qreal mapRatio)
 {
-	_ratio = ratio;
+	Q_UNUSED(deviceRatio);
+
+	_mapRatio = mapRatio;
 	if (_img)
-		_img->setDevicePixelRatio(_ratio);
+		_img->setDevicePixelRatio(_mapRatio);
 }
diff --git a/src/map/ozimap.h b/src/map/ozimap.h
index cf03d480..6e2cf86c 100644
--- a/src/map/ozimap.h
+++ b/src/map/ozimap.h
@@ -33,7 +33,7 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal ratio);
+	void setDevicePixelRatio(qreal deviceRatio, qreal mapRatio);
 	void load();
 	void unload();
 
@@ -43,9 +43,9 @@ public:
 	PointD ll2pp(const Coordinates &c) const
 	  {return _projection.ll2xy(c);}
 	PointD xy2pp(const QPointF &p) const
-	  {return _transform.img2proj(p * _ratio);}
+	  {return _transform.img2proj(p * _mapRatio);}
 	QPointF pp2xy(const PointD &p) const
-	  {return _transform.proj2img(p) / _ratio;}
+	  {return _transform.proj2img(p) / _mapRatio;}
 
 private:
 	struct ImageInfo {
@@ -73,7 +73,7 @@ private:
 	ImageInfo _map, _tile;
 	int _zoom;
 	QPointF _scale;
-	qreal _ratio;
+	qreal _mapRatio;
 
 	bool _valid;
 	QString _errorString;
diff --git a/src/map/wmsmap.cpp b/src/map/wmsmap.cpp
index 979d7974..2a5ebc52 100644
--- a/src/map/wmsmap.cpp
+++ b/src/map/wmsmap.cpp
@@ -104,7 +104,7 @@ bool WMSMap::loadWMS()
 
 WMSMap::WMSMap(const QString &name, const WMS::Setup &setup, QObject *parent)
   : Map(parent), _name(name), _setup(setup), _tileLoader(0), _zoom(0),
-  _ratio(1.0), _valid(false)
+  _mapRatio(1.0), _valid(false)
 {
 	_tileLoader = new TileLoader(tilesDir(), this);
 	_tileLoader->setAuthorization(_setup.authorization());
@@ -124,8 +124,8 @@ void WMSMap::clearCache()
 
 QRectF WMSMap::bounds()
 {
-	return QRectF(_transform.proj2img(_bbox.topLeft()) / _ratio,
-	  _transform.proj2img(_bbox.bottomRight()) / _ratio);
+	return QRectF(_transform.proj2img(_bbox.topLeft()) / _mapRatio,
+	  _transform.proj2img(_bbox.bottomRight()) / _mapRatio);
 }
 
 int WMSMap::zoomFit(const QSize &size, const RectC &rect)
@@ -141,7 +141,7 @@ int WMSMap::zoomFit(const QSize &size, const RectC &rect)
 
 		_zoom = 0;
 		for (int i = 0; i < _zooms.size(); i++) {
-			if (sd2res(_zooms.at(i)) < resolution / _ratio)
+			if (sd2res(_zooms.at(i)) < resolution / _mapRatio)
 				break;
 			_zoom = i;
 		}
@@ -174,17 +174,17 @@ int WMSMap::zoomOut()
 
 QPointF WMSMap::ll2xy(const Coordinates &c)
 {
-	return _transform.proj2img(_projection.ll2xy(c)) / _ratio;
+	return _transform.proj2img(_projection.ll2xy(c)) / _mapRatio;
 }
 
 Coordinates WMSMap::xy2ll(const QPointF &p)
 {
-	return _projection.xy2ll(_transform.img2proj(p * _ratio));
+	return _projection.xy2ll(_transform.img2proj(p * _mapRatio));
 }
 
 qreal WMSMap::tileSize() const
 {
-	return (TILE_SIZE / _ratio);
+	return (TILE_SIZE / _mapRatio);
 }
 
 void WMSMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
@@ -220,7 +220,7 @@ void WMSMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 		QPointF tp(t.xy().x() * tileSize(), t.xy().y() * tileSize());
 		if (!t.pixmap().isNull()) {
 #ifdef ENABLE_HIDPI
-			t.pixmap().setDevicePixelRatio(_ratio);
+			t.pixmap().setDevicePixelRatio(_mapRatio);
 #endif // ENABLE_HIDPI
 			painter->drawPixmap(tp, t.pixmap());
 		}
diff --git a/src/map/wmsmap.h b/src/map/wmsmap.h
index c8f18fbc..974a606f 100644
--- a/src/map/wmsmap.h
+++ b/src/map/wmsmap.h
@@ -31,7 +31,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal ratio) {_ratio = ratio;}
+	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
+	  {_mapRatio = mapRatio;}
 	void clearCache();
 
 	bool isValid() const {return _valid;}
@@ -56,7 +57,7 @@ private:
 	QVector<double> _zooms;
 	RectD _bbox;
 	int _zoom;
-	qreal _ratio;
+	qreal _mapRatio;
 
 	bool _valid;
 	QString _errorString;
diff --git a/src/map/wmtsmap.cpp b/src/map/wmtsmap.cpp
index 5de61902..98ee9df4 100644
--- a/src/map/wmtsmap.cpp
+++ b/src/map/wmtsmap.cpp
@@ -39,7 +39,7 @@ bool WMTSMap::loadWMTS()
 
 WMTSMap::WMTSMap(const QString &name, const WMTS::Setup &setup, qreal tileRatio,
   QObject *parent) : Map(parent), _name(name), _setup(setup), _tileLoader(0),
-  _zoom(0), _deviceRatio(1.0), _tileRatio(tileRatio), _valid(false)
+  _zoom(0), _mapRatio(1.0), _tileRatio(tileRatio), _valid(false)
 {
 	_tileLoader = new TileLoader(tilesDir(), this);
 	_tileLoader->setAuthorization(_setup.authorization());
@@ -151,12 +151,12 @@ int WMTSMap::zoomOut()
 
 qreal WMTSMap::coordinatesRatio() const
 {
-	return _deviceRatio > 1.0 ? _deviceRatio / _tileRatio : 1.0;
+	return _mapRatio > 1.0 ? _mapRatio / _tileRatio : 1.0;
 }
 
 qreal WMTSMap::imageRatio() const
 {
-	return _deviceRatio > 1.0 ? _deviceRatio : _tileRatio;
+	return _mapRatio > 1.0 ? _mapRatio : _tileRatio;
 }
 
 QSizeF WMTSMap::tileSize(const WMTS::Zoom &zoom) const
diff --git a/src/map/wmtsmap.h b/src/map/wmtsmap.h
index 11d6015e..e6ed6e87 100644
--- a/src/map/wmtsmap.h
+++ b/src/map/wmtsmap.h
@@ -31,7 +31,8 @@ public:
 
 	void draw(QPainter *painter, const QRectF &rect, Flags flags);
 
-	void setDevicePixelRatio(qreal ratio) {_deviceRatio = ratio;}
+	void setDevicePixelRatio(qreal /*deviceRatio*/, qreal mapRatio)
+	  {_mapRatio = mapRatio;}
 	void clearCache();
 
 	bool isValid() const {return _valid;}
@@ -55,7 +56,7 @@ private:
 	Transform _transform;
 	CoordinateSystem _cs;
 	int _zoom;
-	qreal _deviceRatio, _tileRatio;
+	qreal _mapRatio, _tileRatio;
 
 	bool _valid;
 	QString _errorString;