diff --git a/src/map/atlas.cpp b/src/map/atlas.cpp
index 01318e8f..076b87b6 100644
--- a/src/map/atlas.cpp
+++ b/src/map/atlas.cpp
@@ -22,12 +22,12 @@ static bool resCmp(OfflineMap *m1, OfflineMap *m2)
 	return r1 > r2;
 }
 
-static bool xCmp(const OfflineMap *m1, const OfflineMap *m2)
+static bool xCmp(OfflineMap *m1, OfflineMap *m2)
 {
 	return TL(m1).x() < TL(m2).x();
 }
 
-static bool yCmp(const OfflineMap *m1, const OfflineMap *m2)
+static bool yCmp(OfflineMap *m1, OfflineMap *m2)
 {
 	return TL(m1).y() > TL(m2).y();
 }
@@ -147,7 +147,7 @@ Atlas::Atlas(const QString &fileName, QObject *parent)
 	_valid = true;
 }
 
-QRectF Atlas::bounds() const
+QRectF Atlas::bounds()
 {
 	QSizeF s(0, 0);
 
diff --git a/src/map/atlas.h b/src/map/atlas.h
index f3a2f78b..fda52370 100644
--- a/src/map/atlas.h
+++ b/src/map/atlas.h
@@ -13,9 +13,9 @@ class Atlas : public Map
 public:
 	Atlas(const QString &fileName, QObject *parent = 0);
 
-	const QString &name() const {return _name;}
+	QString name() const {return _name;}
 
-	QRectF bounds() const;
+	QRectF bounds();
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
diff --git a/src/map/emptymap.cpp b/src/map/emptymap.cpp
index bbdc1986..967d86a1 100644
--- a/src/map/emptymap.cpp
+++ b/src/map/emptymap.cpp
@@ -46,7 +46,7 @@ EmptyMap::EmptyMap(QObject *parent) : Map(parent)
 	_zoom = ZOOM_MAX;
 }
 
-QRectF EmptyMap::bounds() const
+QRectF EmptyMap::bounds()
 {
 	return QRectF(ll2xy(Coordinates(-180, 85)), ll2xy(Coordinates(180, -85)));
 }
@@ -92,14 +92,14 @@ void EmptyMap::draw(QPainter *painter, const QRectF &rect, bool block)
 	Q_UNUSED(block);
 }
 
-QPointF EmptyMap::ll2xy(const Coordinates &c) const
+QPointF EmptyMap::ll2xy(const Coordinates &c)
 {
 	qreal scale = zoom2scale(_zoom);
 	QPointF m = ll2m(c);
 	return QPointF(m.x() / scale, m.y() / -scale);
 }
 
-Coordinates EmptyMap::xy2ll(const QPointF &p) const
+Coordinates EmptyMap::xy2ll(const QPointF &p)
 {
 	qreal scale = zoom2scale(_zoom);
 	return m2ll(QPointF(p.x() * scale, -p.y() * scale));
diff --git a/src/map/emptymap.h b/src/map/emptymap.h
index d16725aa..3e190c23 100644
--- a/src/map/emptymap.h
+++ b/src/map/emptymap.h
@@ -10,9 +10,9 @@ class EmptyMap : public Map
 public:
 	EmptyMap(QObject *parent = 0);
 
-	const QString &name() const {return _name;}
+	QString name() const {return QString();}
 
-	QRectF bounds() const;
+	QRectF bounds();
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
@@ -21,18 +21,12 @@ public:
 	int zoomIn();
 	int zoomOut();
 
-	QPointF ll2xy(const Coordinates &c)
-		{return static_cast<const EmptyMap &>(*this).ll2xy(c);}
-	Coordinates xy2ll(const QPointF &p)
-		{return static_cast<const EmptyMap &>(*this).xy2ll(p);}
+	QPointF ll2xy(const Coordinates &c);
+	Coordinates xy2ll(const QPointF &p);
 
 	void draw(QPainter *painter, const QRectF &rect, bool block);
 
 private:
-	QPointF ll2xy(const Coordinates &c) const;
-	Coordinates xy2ll(const QPointF &p) const;
-
-	QString _name;
 	int _zoom;
 };
 
diff --git a/src/map/jnxmap.cpp b/src/map/jnxmap.cpp
index 2f30acf6..55dd2772 100644
--- a/src/map/jnxmap.cpp
+++ b/src/map/jnxmap.cpp
@@ -158,7 +158,7 @@ Coordinates JNXMap::xy2ll(const QPointF &p)
 	return Coordinates(pp.x(), pp.y());
 }
 
-QRectF JNXMap::bounds() const
+QRectF JNXMap::bounds()
 {
 	const Transform &t = _zooms.at(_zoom).transform;
 
diff --git a/src/map/jnxmap.h b/src/map/jnxmap.h
index 7461a5ba..db5a6d69 100644
--- a/src/map/jnxmap.h
+++ b/src/map/jnxmap.h
@@ -16,9 +16,9 @@ public:
 public:
 	JNXMap(const QString &fileName, QObject *parent = 0);
 
-	const QString &name() const {return _name;}
+	QString name() const {return _name;}
 
-	QRectF bounds() const;
+	QRectF bounds();
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom) {_zoom = zoom;}
diff --git a/src/map/map.h b/src/map/map.h
index 3b96c81e..dc9c8473 100644
--- a/src/map/map.h
+++ b/src/map/map.h
@@ -18,9 +18,9 @@ public:
 	Map(QObject *parent = 0) : QObject(parent) {}
 	virtual ~Map() {}
 
-	virtual const QString &name() const = 0;
+	virtual QString name() const = 0;
 
-	virtual QRectF bounds() const = 0;
+	virtual QRectF bounds() = 0;
 	virtual qreal resolution(const QRectF &rect);
 
 	virtual int zoom() const = 0;
diff --git a/src/map/offlinemap.cpp b/src/map/offlinemap.cpp
index b4732747..a1f2f8e9 100644
--- a/src/map/offlinemap.cpp
+++ b/src/map/offlinemap.cpp
@@ -333,7 +333,7 @@ Coordinates OfflineMap::xy2ll(const QPointF &p)
 	  : _projection.xy2ll(_transform.img2proj(p));
 }
 
-QRectF OfflineMap::bounds() const
+QRectF OfflineMap::bounds()
 {
 	return _ozf
 	  ? QRectF(QPointF(0, 0), _ozf->size(_zoom))
diff --git a/src/map/offlinemap.h b/src/map/offlinemap.h
index ecf953be..4b7abefd 100644
--- a/src/map/offlinemap.h
+++ b/src/map/offlinemap.h
@@ -18,9 +18,9 @@ public:
 	OfflineMap(const QString &fileName, Tar &tar, QObject *parent = 0);
 	~OfflineMap();
 
-	const QString &name() const {return _name;}
+	QString name() const {return _name;}
 
-	QRectF bounds() const;
+	QRectF bounds();
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom) {_zoom = zoom;}
diff --git a/src/map/onlinemap.cpp b/src/map/onlinemap.cpp
index ac128917..bf8cc31a 100644
--- a/src/map/onlinemap.cpp
+++ b/src/map/onlinemap.cpp
@@ -64,7 +64,7 @@ OnlineMap::OnlineMap(const QString &name, const QString &url,
 	_valid = true;
 }
 
-QRectF OnlineMap::bounds() const
+QRectF OnlineMap::bounds()
 {
 	return QRectF(ll2xy(_bounds.topLeft()), ll2xy(_bounds.bottomRight()));
 }
@@ -141,14 +141,14 @@ void OnlineMap::draw(QPainter *painter, const QRectF &rect, bool block)
 	}
 }
 
-QPointF OnlineMap::ll2xy(const Coordinates &c) const
+QPointF OnlineMap::ll2xy(const Coordinates &c)
 {
 	qreal scale = zoom2scale(_zoom);
 	QPointF m = ll2m(c);
 	return QPointF(m.x() / scale, m.y() / -scale);
 }
 
-Coordinates OnlineMap::xy2ll(const QPointF &p) const
+Coordinates OnlineMap::xy2ll(const QPointF &p)
 {
 	qreal scale = zoom2scale(_zoom);
 	return m2ll(QPointF(p.x() * scale, -p.y() * scale));
diff --git a/src/map/onlinemap.h b/src/map/onlinemap.h
index d2fb45b9..f87e5143 100644
--- a/src/map/onlinemap.h
+++ b/src/map/onlinemap.h
@@ -15,9 +15,9 @@ public:
 	  const RectC &bounds, const Authorization &authorization,
 	  QObject *parent = 0);
 
-	const QString &name() const {return _name;}
+	QString name() const {return _name;}
 
-	QRectF bounds() const;
+	QRectF bounds();
 	qreal resolution(const QRectF &rect);
 
 	int zoom() const {return _zoom;}
@@ -26,10 +26,8 @@ public:
 	int zoomIn();
 	int zoomOut();
 
-	QPointF ll2xy(const Coordinates &c)
-		{return static_cast<const OnlineMap &>(*this).ll2xy(c);}
-	Coordinates xy2ll(const QPointF &p)
-		{return static_cast<const OnlineMap &>(*this).xy2ll(p);}
+	QPointF ll2xy(const Coordinates &c);
+	Coordinates xy2ll(const QPointF &p);
 
 	void draw(QPainter *painter, const QRectF &rect, bool block);
 
@@ -39,8 +37,6 @@ public:
 	QString errorString() const {return _errorString;}
 
 private:
-	QPointF ll2xy(const Coordinates &c) const;
-	Coordinates xy2ll(const QPointF &p) const;
 	int limitZoom(int zoom) const;
 
 	TileLoader *_tileLoader;
diff --git a/src/map/wmsmap.cpp b/src/map/wmsmap.cpp
index efdb0c6b..37ca585e 100644
--- a/src/map/wmsmap.cpp
+++ b/src/map/wmsmap.cpp
@@ -127,7 +127,7 @@ void WMSMap::clearCache()
 		qWarning("%s: %s\n", qPrintable(_name), qPrintable(_errorString));
 }
 
-QRectF WMSMap::bounds() const
+QRectF WMSMap::bounds()
 {
 	return QRectF(_transform.proj2img(_bbox.topLeft()),
 	  _transform.proj2img(_bbox.bottomRight()));
diff --git a/src/map/wmsmap.h b/src/map/wmsmap.h
index 2c44ca0a..9e70b50a 100644
--- a/src/map/wmsmap.h
+++ b/src/map/wmsmap.h
@@ -16,9 +16,9 @@ class WMSMap : public Map
 public:
 	WMSMap(const QString &name, const WMS::Setup &setup, QObject *parent = 0);
 
-	const QString &name() const {return _name;}
+	QString name() const {return _name;}
 
-	QRectF bounds() const;
+	QRectF bounds();
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
diff --git a/src/map/wmtsmap.cpp b/src/map/wmtsmap.cpp
index 8ddbf26f..611f7850 100644
--- a/src/map/wmtsmap.cpp
+++ b/src/map/wmtsmap.cpp
@@ -91,7 +91,7 @@ void WMTSMap::updateTransform()
 	_transform = Transform(tl, br);
 }
 
-QRectF WMTSMap::bounds() const
+QRectF WMTSMap::bounds()
 {
 	const WMTS::Zoom &z = _zooms.at(_zoom);
 	QRectF tileBounds, bounds;
@@ -179,12 +179,12 @@ void WMTSMap::draw(QPainter *painter, const QRectF &rect, bool block)
 	}
 }
 
-QPointF WMTSMap::ll2xy(const Coordinates &c) const
+QPointF WMTSMap::ll2xy(const Coordinates &c)
 {
 	return _transform.proj2img(_projection.ll2xy(c));
 }
 
-Coordinates WMTSMap::xy2ll(const QPointF &p) const
+Coordinates WMTSMap::xy2ll(const QPointF &p)
 {
 	return _projection.xy2ll(_transform.img2proj(p));
 }
diff --git a/src/map/wmtsmap.h b/src/map/wmtsmap.h
index e177ea55..8fd22a0b 100644
--- a/src/map/wmtsmap.h
+++ b/src/map/wmtsmap.h
@@ -15,9 +15,9 @@ class WMTSMap : public Map
 public:
 	WMTSMap(const QString &name, const WMTS::Setup &setup, QObject *parent = 0);
 
-	const QString &name() const {return _name;}
+	QString name() const {return _name;}
 
-	QRectF bounds() const;
+	QRectF bounds();
 
 	int zoom() const {return _zoom;}
 	void setZoom(int zoom);
@@ -25,10 +25,8 @@ public:
 	int zoomIn();
 	int zoomOut();
 
-	QPointF ll2xy(const Coordinates &c)
-		{return static_cast<const WMTSMap &>(*this).ll2xy(c);}
-	Coordinates xy2ll(const QPointF &p)
-		{return static_cast<const WMTSMap &>(*this).xy2ll(p);}
+	QPointF ll2xy(const Coordinates &c);
+	Coordinates xy2ll(const QPointF &p);
 
 	void draw(QPainter *painter, const QRectF &rect, bool block);
 
@@ -43,9 +41,6 @@ private:
 	QString tilesDir() const;
 	void updateTransform();
 
-	QPointF ll2xy(const Coordinates &c) const;
-	Coordinates xy2ll(const QPointF &p) const;
-
 	QString _name;
 	WMTS::Setup _setup;
 	TileLoader *_tileLoader;