diff --git a/gpxsee.pro b/gpxsee.pro
index 2c208b27..76d7861f 100644
--- a/gpxsee.pro
+++ b/gpxsee.pro
@@ -91,8 +91,10 @@ HEADERS += src/common/config.h \
     src/map/IMG/bitmapline.h \
     src/map/IMG/bitstream.h \
     src/map/IMG/deltastream.h \
+    src/map/IMG/gmap.h \
     src/map/IMG/huffmanstream.h \
     src/map/IMG/huffmantable.h \
+    src/map/IMG/mapdata.h \
     src/map/IMG/textpathitem.h \
     src/map/IMG/textpointitem.h \
     src/map/projection.h \
@@ -249,8 +251,10 @@ SOURCES += src/main.cpp \
     src/map/IMG/bitmapline.cpp \
     src/map/IMG/bitstream.cpp \
     src/map/IMG/deltastream.cpp \
+    src/map/IMG/gmap.cpp \
     src/map/IMG/huffmanstream.cpp \
     src/map/IMG/huffmantable.cpp \
+    src/map/IMG/mapdata.cpp \
     src/map/IMG/textpathitem.cpp \
     src/map/IMG/textpointitem.cpp \
     src/map/maplist.cpp \
diff --git a/src/map/IMG/bitstream.cpp b/src/map/IMG/bitstream.cpp
index 6039bb80..771e32ff 100644
--- a/src/map/IMG/bitstream.cpp
+++ b/src/map/IMG/bitstream.cpp
@@ -32,7 +32,7 @@ bool BitStream1::read(int bits, quint32 &val)
 
 bool BitStream1::flush()
 {
-	if (_length && !_file.seek(_hdl, _hdl.pos + _length))
+	if (_length && !_file.seek(_hdl, _hdl.pos() + _length))
 		return false;
 
 	_length = 0;
@@ -68,7 +68,7 @@ bool BitStream4::read(int bits, quint32 &val)
 
 bool BitStream4::flush()
 {
-	if (_length && !_file.seek(_hdl, _hdl.pos + _length))
+	if (_length && !_file.seek(_hdl, _hdl.pos() + _length))
 		return false;
 
 	_length = 0;
diff --git a/src/map/IMG/gmap.cpp b/src/map/IMG/gmap.cpp
new file mode 100644
index 00000000..c45e4699
--- /dev/null
+++ b/src/map/IMG/gmap.cpp
@@ -0,0 +1,151 @@
+#include <QXmlStreamReader>
+#include <QDir>
+#include "vectortile.h"
+#include "gmap.h"
+
+
+static SubFile::Type tileType(const QString &suffix)
+{
+	if (!suffix.compare("TRE"))
+		return SubFile::TRE;
+	else if (!suffix.compare("RGN"))
+		return SubFile::RGN;
+	else if (!suffix.compare("LBL"))
+		return SubFile::LBL;
+	else if (!suffix.compare("TYP"))
+		return SubFile::TYP;
+	else if (!suffix.compare("GMP"))
+		return SubFile::GMP;
+	else if (!suffix.compare("NET"))
+		return SubFile::NET;
+	else
+		return SubFile::Unknown;
+}
+
+void GMAP::subProduct(QXmlStreamReader &reader, QString &dataDir,
+  QString &baseMap)
+{
+	while (reader.readNextStartElement()) {
+		if (reader.name() == "Directory")
+			dataDir = reader.readElementText();
+		else if (reader.name() == "BaseMap")
+			baseMap = reader.readElementText();
+		else
+			reader.skipCurrentElement();
+	}
+}
+
+void GMAP::mapProduct(QXmlStreamReader &reader, QString &dataDir,
+  QString &typFile, QString &baseMap)
+{
+	while (reader.readNextStartElement()) {
+		if (reader.name() == "Name")
+			_name = reader.readElementText();
+		else if (reader.name() == "TYP")
+			typFile = reader.readElementText();
+		else if (reader.name() == "SubProduct")
+			subProduct(reader, dataDir, baseMap);
+		else
+			reader.skipCurrentElement();
+	}
+}
+
+bool GMAP::readXML(const QString &path, QString &dataDir, QString &typFile,
+  QString &baseMap)
+{
+	QFile file(path);
+
+	if (!file.open(QFile::ReadOnly | QFile::Text))
+		return false;
+
+	QXmlStreamReader reader(&file);
+	if (reader.readNextStartElement()) {
+		if (reader.name() == "MapProduct")
+			mapProduct(reader, dataDir, typFile, baseMap);
+		else
+			reader.raiseError("Not a GMAP XML file");
+	}
+	if (reader.error()) {
+		_errorString = QString("%1: %2").arg(reader.lineNumber())
+		  .arg(reader.errorString());
+		return false;
+	}
+
+	return true;
+}
+
+bool GMAP::loadTile(const QDir &dir, quint16 &id)
+{
+	VectorTile *tile = new VectorTile();
+
+	QFileInfoList ml = dir.entryInfoList(QDir::Files);
+	for (int i = 0; i < ml.size(); i++) {
+		const QFileInfo &fi = ml.at(i);
+		SubFile::Type type = tileType(fi.suffix());
+		if (VectorTile::isTileFile(type)) {
+			SubFile *file = tile->addFile(fi.absoluteFilePath(), type);
+			file->setId(id++);
+		}
+	}
+
+	if (!tile->init()) {
+		qWarning("%s: Invalid map tile", qPrintable(dir.path()));
+		delete tile;
+		return false;
+	}
+
+	double min[2], max[2];
+	min[0] = tile->bounds().left();
+	min[1] = tile->bounds().bottom();
+	max[0] = tile->bounds().right();
+	max[1] = tile->bounds().top();
+	_tileTree.Insert(min, max, tile);
+
+	_bounds |= tile->bounds();
+
+	return true;
+}
+
+GMAP::GMAP(const QString &fileName) : _fileName(fileName)
+{
+	QString dataDirPath, typFile, baseMap;
+	if (!readXML(fileName, dataDirPath, typFile, baseMap))
+		return;
+
+	QDir baseDir(QFileInfo(fileName).absoluteDir());
+	if (!baseDir.exists(dataDirPath)) {
+		_errorString = "Missing/invalid map data directory";
+		return;
+	}
+	QDir dataDir(baseDir.filePath(dataDirPath));
+	QFileInfoList ml = dataDir.entryInfoList(QDir::Dirs | QDir::NoDotAndDotDot);
+
+	quint16 id = 0;
+	for (int i = 0; i < ml.size(); i++) {
+		const QFileInfo &fi = ml.at(i);
+		if (fi.isDir() && fi.baseName() != baseMap)
+			loadTile(QDir(fi.absoluteFilePath()), id);
+	}
+
+	if (baseDir.exists(typFile))
+		_typ = new SubFile(baseDir.filePath(typFile));
+
+	if (!_tileTree.Count())
+		_errorString = "No usable map tile found";
+	else
+		_valid = true;
+}
+
+bool GMAP::isGMAP(const QString &path)
+{
+	QFile file(path);
+
+	if (!file.open(QFile::ReadOnly | QFile::Text))
+		return false;
+
+	QXmlStreamReader reader(&file);
+	if (reader.readNextStartElement() && reader.name() == "MapProduct")
+		return true;
+
+	return false;
+}
diff --git a/src/map/IMG/gmap.h b/src/map/IMG/gmap.h
new file mode 100644
index 00000000..ed5d400d
--- /dev/null
+++ b/src/map/IMG/gmap.h
@@ -0,0 +1,30 @@
+#ifndef GMAP_H
+#define GMAP_H
+
+#include "mapdata.h"
+
+class QXmlStreamReader;
+class QDir;
+
+class GMAP : public MapData
+{
+public:
+	GMAP(const QString &fileName);
+
+	QString fileName() const {return _fileName;}
+
+	static bool isGMAP(const QString &path);
+
+private:
+	QString _fileName;
+
+	bool readXML(const QString &path, QString &dataDir, QString &typFile,
+	  QString &baseMap);
+	void mapProduct(QXmlStreamReader &reader, QString &dataDir,
+	  QString &typFile, QString &baseMap);
+	void subProduct(QXmlStreamReader &reader, QString &dataDir,
+	  QString &baseMap);
+	bool loadTile(const QDir &dir, quint16 &id);
+};
+
+#endif // GMAP_H
diff --git a/src/map/IMG/huffmantable.cpp b/src/map/IMG/huffmantable.cpp
index bb003258..cdf3c519 100644
--- a/src/map/IMG/huffmantable.cpp
+++ b/src/map/IMG/huffmantable.cpp
@@ -55,7 +55,7 @@ bool HuffmanTable::getBuffer(const SubFile &file, SubFile::Handle &hdl,
 			return false;
 		if (!file.readVUInt32(hdl, recordSize))
 			return false;
-		recordOffset = hdl.pos + recordSize;
+		recordOffset = hdl.pos() + recordSize;
 		if (recordOffset > offset + size)
 			return false;
 	};
diff --git a/src/map/IMG/img.cpp b/src/map/IMG/img.cpp
index 2bed58ae..26dbcaab 100644
--- a/src/map/IMG/img.cpp
+++ b/src/map/IMG/img.cpp
@@ -1,6 +1,6 @@
 #include <QMap>
 #include <QtEndian>
-#include "common/programpaths.h"
+
 #include "vectortile.h"
 #include "img.h"
 
@@ -8,32 +8,6 @@
 
 typedef QMap<QString, VectorTile*> TileMap;
 
-struct PolyCTX
-{
-	PolyCTX(const RectC &rect, int bits, QList<IMG::Poly> *polygons,
-	  QList<IMG::Poly> *lines, QCache<const SubDiv*, IMG::Polys> *polyCache)
-	  : rect(rect), bits(bits), polygons(polygons), lines(lines),
-	  polyCache(polyCache) {}
-
-	const RectC &rect;
-	int bits;
-	QList<IMG::Poly> *polygons;
-	QList<IMG::Poly> *lines;
-	QCache<const SubDiv*, IMG::Polys> *polyCache;
-};
-
-struct PointCTX
-{
-	PointCTX(const RectC &rect, int bits, QList<IMG::Point> *points,
-	  QCache<const SubDiv*, QList<IMG::Point> > *pointCache)
-	  : rect(rect), bits(bits), points(points), pointCache(pointCache) {}
-
-	const RectC &rect;
-	int bits;
-	QList<IMG::Point> *points;
-	QCache<const SubDiv*, QList<IMG::Point> > *pointCache;
-};
-
 static SubFile::Type tileType(const char str[3])
 {
 	if (!memcmp(str, "TRE", 3))
@@ -52,8 +26,7 @@ static SubFile::Type tileType(const char str[3])
 		return SubFile::Unknown;
 }
 
-IMG::IMG(const QString &fileName)
-  : _file(fileName), _typ(0), _style(0), _valid(false)
+IMG::IMG(const QString &fileName) : _file(fileName)
 {
 #define CHECK(condition) \
 	if (!(condition)) { \
@@ -191,86 +164,6 @@ IMG::IMG(const QString &fileName)
 		_valid = true;
 }
 
-IMG::~IMG()
-{
-	TileTree::Iterator it;
-	for (_tileTree.GetFirst(it); !_tileTree.IsNull(it); _tileTree.GetNext(it))
-		delete _tileTree.GetAt(it);
-
-	delete _typ;
-	delete _style;
-}
-
-void IMG::load()
-{
-	Q_ASSERT(!_style);
-
-	if (_typ)
-		_style = new Style(_typ);
-	else {
-		QFile typFile(ProgramPaths::typFile());
-		if (typFile.open(QIODevice::ReadOnly)) {
-			SubFile typ(&typFile);
-			_style = new Style(&typ);
-		} else
-			_style = new Style();
-	}
-}
-
-void IMG::clear()
-{
-	TileTree::Iterator it;
-	for (_tileTree.GetFirst(it); !_tileTree.IsNull(it); _tileTree.GetNext(it))
-		_tileTree.GetAt(it)->clear();
-
-	delete _style;
-	_style = 0;
-
-	_polyCache.clear();
-	_pointCache.clear();
-}
-
-static bool polyCb(VectorTile *tile, void *context)
-{
-	PolyCTX *ctx = (PolyCTX*)context;
-	tile->polys(ctx->rect, ctx->bits, ctx->polygons, ctx->lines, ctx->polyCache);
-	return true;
-}
-
-static bool pointCb(VectorTile *tile, void *context)
-{
-	PointCTX *ctx = (PointCTX*)context;
-	tile->points(ctx->rect, ctx->bits, ctx->points, ctx->pointCache);
-	return true;
-}
-
-void IMG::polys(const RectC &rect, int bits, QList<Poly> *polygons,
-  QList<Poly> *lines)
-{
-	PolyCTX ctx(rect, bits, polygons, lines, &_polyCache);
-	double min[2], max[2];
-
-	min[0] = rect.left();
-	min[1] = rect.bottom();
-	max[0] = rect.right();
-	max[1] = rect.top();
-
-	_tileTree.Search(min, max, polyCb, &ctx);
-}
-
-void IMG::points(const RectC &rect, int bits, QList<Point> *points)
-{
-	PointCTX ctx(rect, bits, points, &_pointCache);
-	double min[2], max[2];
-
-	min[0] = rect.left();
-	min[1] = rect.bottom();
-	max[0] = rect.right();
-	max[1] = rect.top();
-
-	_tileTree.Search(min, max, pointCb, &ctx);
-}
-
 qint64 IMG::read(char *data, qint64 maxSize)
 {
 	qint64 ret = _file.read(data, maxSize);
@@ -292,28 +185,12 @@ template<class T> bool IMG::readValue(T &val)
 	return true;
 }
 
-bool IMG::readBlock(int blockNum, QByteArray &data)
+bool IMG::readBlock(int blockNum, char *data)
 {
 	if (!_file.seek((qint64)blockNum * (qint64)_blockSize))
 		return false;
-	data.resize(_blockSize);
-	if (read(data.data(), _blockSize) < _blockSize)
+	if (read(data, _blockSize) < _blockSize)
 		return false;
 
 	return true;
 }
-
-#ifndef QT_NO_DEBUG
-QDebug operator<<(QDebug dbg, const IMG::Point &point)
-{
-	dbg.nospace() << "Point(" << hex << point.type << ", " << point.label
-	  << ", " << point.poi << ")";
-	return dbg.space();
-}
-
-QDebug operator<<(QDebug dbg, const IMG::Poly &poly)
-{
-	dbg.nospace() << "Poly(" << hex << poly.type << ", " << poly.label << ")";
-	return dbg.space();
-}
-#endif // QT_NO_DEBUG
diff --git a/src/map/IMG/img.h b/src/map/IMG/img.h
index 6dd88ce9..7173a447 100644
--- a/src/map/IMG/img.h
+++ b/src/map/IMG/img.h
@@ -2,105 +2,26 @@
 #define IMG_H
 
 #include <QFile>
-#include <QByteArray>
-#include <QCache>
-#include <QDebug>
-#include "common/rtree.h"
-#include "common/rectc.h"
-#include "style.h"
-#include "label.h"
+#include "mapdata.h"
 
-class VectorTile;
-class SubFile;
-class SubDiv;
-
-class IMG
+class IMG : public MapData
 {
 public:
-	struct Poly {
-		/* QPointF insted of Coordinates for performance reasons (no need to
-		   duplicate all the vectors for drawing). Note, that we do not want to
-		   ll2xy() the points in the IMG class as this can not be done in
-		   parallel. */
-		QVector<QPointF> points;
-		Label label;
-		quint32 type;
-		RectC boundingRect;
-
-		bool operator<(const Poly &other) const
-		  {return type > other.type;}
-	};
-
-	struct Point {
-		Point() : id(0) {}
-
-		Coordinates coordinates;
-		Label label;
-		quint32 type;
-		bool poi;
-		quint64 id;
-
-		bool operator<(const Point &other) const
-		  {return id < other.id;}
-	};
-
-	struct Polys {
-		Polys() {}
-		Polys(const QList<Poly> &polygons, const QList<Poly> &lines)
-			: polygons(polygons), lines(lines) {}
-
-		QList<Poly> polygons;
-		QList<Poly> lines;
-	};
-
 	IMG(const QString &fileName);
-	~IMG();
-
-	void load();
-	void clear();
 
 	QString fileName() const {return _file.fileName();}
-	const QString &name() const {return _name;}
-	const RectC &bounds() const {return _bounds;}
-
-	void polys(const RectC &rect, int bits, QList<Poly> *polygons,
-	  QList<Poly> *lines);
-	void points(const RectC &rect, int bits, QList<Point> *points);
-	const Style *style() const {return _style;}
-
-	bool isValid() const {return _valid;}
-	const QString &errorString() const {return _errorString;}
 
 private:
 	friend class SubFile;
 
-	typedef RTree<VectorTile*, double, 2> TileTree;
-
 	int blockSize() const {return _blockSize;}
-	bool readBlock(int blockNum, QByteArray &data);
+	bool readBlock(int blockNum, char *data);
 	qint64 read(char *data, qint64 maxSize);
 	template<class T> bool readValue(T &val);
 
 	QFile _file;
 	quint8 _key;
 	int _blockSize;
-
-	QString _name;
-	RectC _bounds;
-	TileTree _tileTree;
-	SubFile *_typ;
-	Style *_style;
-
-	QCache<const SubDiv*, Polys> _polyCache;
-	QCache<const SubDiv*, QList<Point> > _pointCache;
-
-	bool _valid;
-	QString _errorString;
 };
 
-#ifndef QT_NO_DEBUG
-QDebug operator<<(QDebug dbg, const IMG::Point &point);
-QDebug operator<<(QDebug dbg, const IMG::Poly &poly);
-#endif // QT_NO_DEBUG
-
 #endif // IMG_H
diff --git a/src/map/IMG/lblfile.h b/src/map/IMG/lblfile.h
index 493f4024..7eeb4ecc 100644
--- a/src/map/IMG/lblfile.h
+++ b/src/map/IMG/lblfile.h
@@ -12,6 +12,9 @@ public:
 	LBLFile(IMG *img)
 	  : SubFile(img), _codec(0), _offset(0), _size(0), _poiOffset(0),
 	  _poiSize(0), _poiMultiplier(0), _multiplier(0), _encoding(0) {}
+	LBLFile(const QString &path)
+	  : SubFile(path), _codec(0), _offset(0), _size(0), _poiOffset(0),
+	  _poiSize(0), _poiMultiplier(0), _multiplier(0), _encoding(0) {}
 	LBLFile(SubFile *gmp, quint32 offset) : SubFile(gmp, offset),
 	  _codec(0), _offset(0), _size(0), _poiOffset(0), _poiSize(0),
 	  _poiMultiplier(0), _multiplier(0), _encoding(0) {}
diff --git a/src/map/IMG/mapdata.cpp b/src/map/IMG/mapdata.cpp
new file mode 100644
index 00000000..801fe78d
--- /dev/null
+++ b/src/map/IMG/mapdata.cpp
@@ -0,0 +1,108 @@
+#include "common/programpaths.h"
+#include "vectortile.h"
+#include "style.h"
+#include "mapdata.h"
+
+
+struct PolyCTX
+{
+	PolyCTX(const RectC &rect, int bits, QList<MapData::Poly> *polygons,
+	  QList<MapData::Poly> *lines, QCache<const SubDiv*,
+	  MapData::Polys> *polyCache) : rect(rect), bits(bits), polygons(polygons),
+	  lines(lines), polyCache(polyCache) {}
+
+	const RectC &rect;
+	int bits;
+	QList<MapData::Poly> *polygons;
+	QList<MapData::Poly> *lines;
+	QCache<const SubDiv*, MapData::Polys> *polyCache;
+};
+
+struct PointCTX
+{
+	PointCTX(const RectC &rect, int bits, QList<MapData::Point> *points,
+	  QCache<const SubDiv*, QList<MapData::Point> > *pointCache)
+	  : rect(rect), bits(bits), points(points), pointCache(pointCache) {}
+
+	const RectC &rect;
+	int bits;
+	QList<MapData::Point> *points;
+	QCache<const SubDiv*, QList<MapData::Point> > *pointCache;
+};
+
+inline bool polyCb(VectorTile *tile, void *context)
+{
+	PolyCTX *ctx = (PolyCTX*)context;
+	tile->polys(ctx->rect, ctx->bits, ctx->polygons, ctx->lines, ctx->polyCache);
+	return true;
+}
+
+inline bool pointCb(VectorTile *tile, void *context)
+{
+	PointCTX *ctx = (PointCTX*)context;
+	tile->points(ctx->rect, ctx->bits, ctx->points, ctx->pointCache);
+	return true;
+}
+
+
+MapData::~MapData()
+{
+	TileTree::Iterator it;
+	for (_tileTree.GetFirst(it); !_tileTree.IsNull(it); _tileTree.GetNext(it))
+		delete _tileTree.GetAt(it);
+
+	delete _typ;
+	delete _style;
+}
+
+void MapData::polys(const RectC &rect, int bits, QList<Poly> *polygons,
+  QList<Poly> *lines)
+{
+	PolyCTX ctx(rect, bits, polygons, lines, &_polyCache);
+	double min[2], max[2];
+
+	min[0] = rect.left();
+	min[1] = rect.bottom();
+	max[0] = rect.right();
+	max[1] = rect.top();
+
+	_tileTree.Search(min, max, polyCb, &ctx);
+}
+
+void MapData::points(const RectC &rect, int bits, QList<Point> *points)
+{
+	PointCTX ctx(rect, bits, points, &_pointCache);
+	double min[2], max[2];
+
+	min[0] = rect.left();
+	min[1] = rect.bottom();
+	max[0] = rect.right();
+	max[1] = rect.top();
+
+	_tileTree.Search(min, max, pointCb, &ctx);
+}
+
+void MapData::load()
+{
+	Q_ASSERT(!_style);
+
+	if (_typ)
+		_style = new Style(_typ);
+	else {
+		SubFile typ(ProgramPaths::typFile());
+		_style = new Style(&typ);
+	}
+}
+
+void MapData::clear()
+{
+	TileTree::Iterator it;
+	for (_tileTree.GetFirst(it); !_tileTree.IsNull(it); _tileTree.GetNext(it))
+		_tileTree.GetAt(it)->clear();
+
+	delete _style;
+	_style = 0;
+
+	_polyCache.clear();
+	_pointCache.clear();
+}
diff --git a/src/map/IMG/mapdata.h b/src/map/IMG/mapdata.h
new file mode 100644
index 00000000..ac14becb
--- /dev/null
+++ b/src/map/IMG/mapdata.h
@@ -0,0 +1,105 @@
+#ifndef MAPDATA_H
+#define MAPDATA_H
+
+#include <QList>
+#include <QPointF>
+#include <QCache>
+#include <QDebug>
+#include "common/rectc.h"
+#include "common/rtree.h"
+#include "label.h"
+
+class Style;
+class SubDiv;
+class SubFile;
+class VectorTile;
+
+class MapData
+{
+public:
+	struct Poly {
+		/* QPointF insted of Coordinates for performance reasons (no need to
+		   duplicate all the vectors for drawing). Note, that we do not want to
+		   ll2xy() the points in the IMG class as this can not be done in
+		   parallel. */
+		QVector<QPointF> points;
+		Label label;
+		quint32 type;
+		RectC boundingRect;
+
+		bool operator<(const Poly &other) const
+		  {return type > other.type;}
+	};
+
+	struct Point {
+		Point() : id(0) {}
+
+		Coordinates coordinates;
+		Label label;
+		quint32 type;
+		bool poi;
+		quint64 id;
+
+		bool operator<(const Point &other) const
+		  {return id < other.id;}
+	};
+
+	struct Polys {
+		Polys() {}
+		Polys(const QList<Poly> &polygons, const QList<Poly> &lines)
+			: polygons(polygons), lines(lines) {}
+
+		QList<Poly> polygons;
+		QList<Poly> lines;
+	};
+
+	MapData() : _typ(0), _style(0), _valid(false) {}
+	virtual ~MapData();
+
+	const QString &name() const {return _name;}
+	const RectC &bounds() const {return _bounds;}
+	const Style *style() const {return _style;}
+	void polys(const RectC &rect, int bits, QList<Poly> *polygons,
+	  QList<Poly> *lines);
+	void points(const RectC &rect, int bits, QList<Point> *points);
+
+	void load();
+	void clear();
+
+	virtual QString fileName() const = 0;
+
+	bool isValid() const {return _valid;}
+	QString errorString() const {return _errorString;}
+
+protected:
+	typedef RTree<VectorTile*, double, 2> TileTree;
+
+	QString _name;
+	RectC _bounds;
+	SubFile *_typ;
+	Style *_style;
+
+	TileTree _tileTree;
+	QCache<const SubDiv*, Polys> _polyCache;
+	QCache<const SubDiv*, QList<Point> > _pointCache;
+
+	bool _valid;
+	QString _errorString;
+};
+
+#ifndef QT_NO_DEBUG
+inline QDebug operator<<(QDebug dbg, const MapData::Point &point)
+{
+	dbg.nospace() << "Point(" << hex << point.type << ", " << point.label
+	  << ", " << point.poi << ")";
+	return dbg.space();
+}
+
+inline QDebug operator<<(QDebug dbg, const MapData::Poly &poly)
+{
+	dbg.nospace() << "Poly(" << hex << poly.type << ", " << poly.label << ")";
+	return dbg.space();
+}
+#endif // QT_NO_DEBUG
+
+#endif // MAPDATA_H
diff --git a/src/map/IMG/netfile.h b/src/map/IMG/netfile.h
index 9efba89d..bc0779ff 100644
--- a/src/map/IMG/netfile.h
+++ b/src/map/IMG/netfile.h
@@ -6,9 +6,12 @@
 class NETFile : public SubFile
 {
 public:
-	NETFile(IMG *img) : SubFile(img), _offset(0), _size(0), _multiplier(0) {}
-	NETFile(SubFile *gmp, quint32 offset) : SubFile(gmp, offset),
-	  _offset(0), _size(0), _multiplier(0) {}
+	NETFile(IMG *img)
+	  : SubFile(img), _offset(0), _size(0), _multiplier(0) {}
+	NETFile(const QString &path)
+	  : SubFile(path), _offset(0), _size(0), _multiplier(0) {}
+	NETFile(SubFile *gmp, quint32 offset)
+	  : SubFile(gmp, offset), _offset(0), _size(0), _multiplier(0) {}
 
 	bool lblOffset(Handle &hdl, quint32 netOffset, quint32 &lblOffset);
 
diff --git a/src/map/IMG/rgnfile.cpp b/src/map/IMG/rgnfile.cpp
index c0dc8ab6..71822863 100644
--- a/src/map/IMG/rgnfile.cpp
+++ b/src/map/IMG/rgnfile.cpp
@@ -35,7 +35,7 @@ bool RGNFile::skipClassFields(Handle &hdl) const
 			break;
 	}
 
-	return seek(hdl, hdl.pos + rs);
+	return seek(hdl, hdl.pos() + rs);
 }
 
 bool RGNFile::skipLclFields(Handle &hdl, const quint32 flags[3],
@@ -133,7 +133,7 @@ bool RGNFile::polyObjects(Handle &hdl, const SubDiv *subdiv,
 	qint16 lon, lat;
 	quint16 len;
 
-	while (hdl.pos < (int)segment.end()) {
+	while (hdl.pos() < (int)segment.end()) {
 		IMG::Poly poly;
 
 		if (!(readUInt8(hdl, type) && readUInt24(hdl, labelPtr)
@@ -206,7 +206,7 @@ bool RGNFile::extPolyObjects(Handle &hdl, const SubDiv *subdiv, quint32 shift,
 	if (!seek(hdl, segment.offset()))
 		return false;
 
-	while (hdl.pos < (int)segment.end()) {
+	while (hdl.pos() < (int)segment.end()) {
 		IMG::Poly poly;
 		QPoint pos;
 
@@ -305,7 +305,7 @@ bool RGNFile::pointObjects(Handle &hdl, const SubDiv *subdiv,
 	if (!seek(hdl, segment.offset()))
 		return false;
 
-	while (hdl.pos < (int)segment.end()) {
+	while (hdl.pos() < (int)segment.end()) {
 		IMG::Point point;
 
 		if (!(readUInt8(hdl, type) && readUInt24(hdl, labelPtr)
@@ -327,7 +327,7 @@ bool RGNFile::pointObjects(Handle &hdl, const SubDiv *subdiv,
 		point.poi = labelPtr & 0x400000;
 		if (lbl && (labelPtr & 0x3FFFFF)) {
 			point.label = lbl->label(lblHdl, labelPtr & 0x3FFFFF, point.poi);
-			point.id = ((quint64)point.type)<<40 | ((quint64)lbl->offset())<<24
+			point.id = ((quint64)point.type)<<40 | ((quint64)lbl->id())<<24
 			  | (labelPtr & 0x3FFFFF);
 		}
 
@@ -351,7 +351,7 @@ bool RGNFile::extPointObjects(Handle &hdl, const SubDiv *subdiv, LBLFile *lbl,
 	if (!seek(hdl, segment.offset()))
 		return false;
 
-	while (hdl.pos < (int)segment.end()) {
+	while (hdl.pos() < (int)segment.end()) {
 		IMG::Point point;
 
 		if (!(readUInt8(hdl, type) && readUInt8(hdl, subtype)
@@ -382,7 +382,7 @@ bool RGNFile::extPointObjects(Handle &hdl, const SubDiv *subdiv, LBLFile *lbl,
 		if (lbl && (labelPtr & 0x3FFFFF)) {
 			point.label = lbl->label(lblHdl, labelPtr & 0x3FFFFF, point.poi);
 			point.id = ((quint64)point.type)<<40
-			  | ((quint64)lbl->offset())<<24 | (labelPtr & 0x3FFFFF);
+			  | ((quint64)lbl->id())<<24 | (labelPtr & 0x3FFFFF);
 		}
 
 		points->append(point);
diff --git a/src/map/IMG/rgnfile.h b/src/map/IMG/rgnfile.h
index f9336385..b432147e 100644
--- a/src/map/IMG/rgnfile.h
+++ b/src/map/IMG/rgnfile.h
@@ -24,6 +24,10 @@ public:
 	  : SubFile(img), _offset(0), _size(0), _polygonsOffset(0),
 	  _polygonsSize(0), _linesOffset(0), _linesSize(0), _pointsOffset(0),
 	  _pointsSize(0), _init(false) {clearFlags();}
+	RGNFile(const QString &path)
+	  : SubFile(path), _offset(0), _size(0), _polygonsOffset(0),
+	  _polygonsSize(0), _linesOffset(0), _linesSize(0), _pointsOffset(0),
+	  _pointsSize(0), _init(false) {clearFlags();}
 	RGNFile(SubFile *gmp, quint32 offset) : SubFile(gmp, offset), _offset(0),
 	  _size(0), _polygonsOffset(0), _polygonsSize(0), _linesOffset(0),
 	  _linesSize(0), _pointsOffset(0), _pointsSize(0), _init(false)
diff --git a/src/map/IMG/style.cpp b/src/map/IMG/style.cpp
index 5b38d96c..139149f4 100644
--- a/src/map/IMG/style.cpp
+++ b/src/map/IMG/style.cpp
@@ -341,7 +341,7 @@ static bool skipLocalization(SubFile *file, SubFile::Handle &hdl)
 		len = len >> 2;
 	}
 
-	if (!file->seek(hdl, hdl.pos + len))
+	if (!file->seek(hdl, hdl.pos() + len))
 		return false;
 
 	return true;
@@ -890,7 +890,7 @@ bool Style::parseDrawOrder(SubFile *file, SubFile::Handle &hdl,
 
 bool Style::parseTYPFile(SubFile *file)
 {
-	SubFile::Handle hdl;
+	SubFile::Handle hdl(file);
 	Section points, lines, polygons, order;
 	quint16 tmp16, codepage;
 
diff --git a/src/map/IMG/subfile.cpp b/src/map/IMG/subfile.cpp
index 7820fb97..794987b8 100644
--- a/src/map/IMG/subfile.cpp
+++ b/src/map/IMG/subfile.cpp
@@ -5,22 +5,35 @@
 
 bool SubFile::seek(Handle &handle, quint32 pos) const
 {
-	if (_file)
-		return _file->seek(pos);
-	else {
+	if (handle._file) {
+		int blockNum = pos / BLOCK_SIZE;
+
+		if (handle._blockNum != blockNum) {
+			if (!handle._file->seek((qint64)blockNum * BLOCK_SIZE))
+				return false;
+			if (handle._file->read(handle._data.data(), BLOCK_SIZE) < 0)
+				return false;
+			handle._blockNum = blockNum;
+		}
+
+		handle._blockPos = pos % BLOCK_SIZE;
+		handle._pos = pos;
+
+		return true;
+	} else {
 		quint32 blockSize = _img->blockSize();
 		int blockNum = pos / blockSize;
 
-		if (handle.blockNum != blockNum) {
+		if (handle._blockNum != blockNum) {
 			if (blockNum >= _blocks->size())
 				return false;
-			if (!_img->readBlock(_blocks->at(blockNum), handle.data))
+			if (!_img->readBlock(_blocks->at(blockNum), handle._data.data()))
 				return false;
-			handle.blockNum = blockNum;
+			handle._blockNum = blockNum;
 		}
 
-		handle.blockPos = pos % blockSize;
-		handle.pos = pos;
+		handle._blockPos = pos % blockSize;
+		handle._pos = pos;
 
 		return true;
 	}
@@ -28,14 +41,10 @@ bool SubFile::seek(Handle &handle, quint32 pos) const
 
 bool SubFile::readByte(Handle &handle, quint8 &val) const
 {
-	if (_file)
-		return _file->getChar((char*)&val);
-	else {
-		val = handle.data.at(handle.blockPos++);
-		handle.pos++;
-		return (handle.blockPos >= _img->blockSize())
-		  ? seek(handle, handle.pos) : true;
-	}
+	int blockSize = handle._file ? BLOCK_SIZE : _img->blockSize();
+	val = handle._data.at(handle._blockPos++);
+	handle._pos++;
+	return (handle._blockPos >= blockSize) ? seek(handle, handle._pos) : true;
 }
 
 bool SubFile::readVUInt32(Handle &hdl, quint32 &val) const
@@ -77,7 +86,7 @@ bool SubFile::readVBitfield32(Handle &hdl, quint32 &bitfield) const
 		return false;
 
 	if (!(bits & 1)) {
-		seek(hdl, hdl.pos - 1);
+		seek(hdl, hdl._pos - 1);
 		if (!((bits>>1) & 1)) {
 			if (!((bits>>2) & 1)) {
 				if (!readUInt32(hdl, bitfield))
@@ -97,8 +106,3 @@ bool SubFile::readVBitfield32(Handle &hdl, quint32 &bitfield) const
 
 	return true;
 }
-
-QString SubFile::fileName() const
-{
-	return _file ? _file->fileName() : _img->fileName();
-}
diff --git a/src/map/IMG/subfile.h b/src/map/IMG/subfile.h
index c987c886..d1d275a1 100644
--- a/src/map/IMG/subfile.h
+++ b/src/map/IMG/subfile.h
@@ -3,38 +3,64 @@
 
 #include <QVector>
 #include <QDebug>
+#include <QFile>
+#include "img.h"
 
-class QFile;
-class IMG;
+
+#define BLOCK_SIZE 8192
 
 class SubFile
 {
 public:
 	enum Type {Unknown, TRE, RGN, LBL, NET, TYP, GMP};
 
-	struct Handle
+	class Handle
 	{
-		Handle() : blockNum(-1), blockPos(-1), pos(-1) {}
+	public:
+		Handle(const SubFile *subFile)
+		  : _file(0), _blockNum(-1), _blockPos(-1), _pos(-1)
+		{
+			if (subFile && subFile->_path) {
+				_file = new QFile(*(subFile->_path));
+				_file->open(QIODevice::ReadOnly);
+				_data.resize(BLOCK_SIZE);
+			} else if (subFile)
+				_data.resize(subFile->_img->blockSize());
+			_blockNum = -1;
+			_blockPos = -1;
+			_pos = -1;
+		}
+		~Handle() {delete _file;}
 
-		QByteArray data;
-		int blockNum;
-		int blockPos;
-		int pos;
+		int pos() const {return _pos;}
+
+	private:
+		friend class SubFile;
+
+		QFile *_file;
+		QByteArray _data;
+		int _blockNum;
+		int _blockPos;
+		int _pos;
 	};
 
 	SubFile(IMG *img)
-	  : _gmpOffset(0), _img(img), _blocks(new QVector<quint16>()), _file(0) {}
+	  : _gmpOffset(0), _img(img), _blocks(new QVector<quint16>()), _path(0),
+	  _id(0) {}
 	SubFile(SubFile *gmp, quint32 offset) : _gmpOffset(offset), _img(gmp->_img),
-	  _blocks(gmp->_blocks), _file(gmp->_file) {}
-	SubFile(QFile *file)
-	  : _gmpOffset(0), _img(0), _blocks(0), _file(file) {}
+	  _blocks(gmp->_blocks), _path(gmp->_path), _id(gmp->id()) {}
+	SubFile(const QString &path)
+	  : _gmpOffset(0), _img(0), _blocks(0), _path(new QString(path)), _id(0) {}
 	~SubFile()
 	{
-		if (!_gmpOffset)
+		if (!_gmpOffset) {
 			delete _blocks;
+			delete _path;
+		}
 	}
 
 	void addBlock(quint16 block) {_blocks->append(block);}
+	void setId(quint16 id) {_id = id;}
 
 	bool seek(Handle &handle, quint32 pos) const;
 
@@ -114,8 +140,8 @@ public:
 	bool readVUInt32(Handle &hdl, quint32 &val) const;
 	bool readVBitfield32(Handle &hdl, quint32 &bitfield) const;
 
-	quint16 offset() const {return _blocks->first();}
-	QString fileName() const;
+	quint16 id() const {return _blocks ? _blocks->first() : _id;}
+	QString fileName() const {return _path ? *_path : _img->fileName();}
 
 protected:
 	quint32 _gmpOffset;
@@ -125,7 +151,8 @@ private:
 
 	IMG *_img;
 	QVector<quint16> *_blocks;
-	QFile *_file;
+	QString *_path;
+	quint16 _id;
 };
 
 #endif // SUBFILE_H
diff --git a/src/map/IMG/trefile.cpp b/src/map/IMG/trefile.cpp
index 02c11aa2..0bfd0cb7 100644
--- a/src/map/IMG/trefile.cpp
+++ b/src/map/IMG/trefile.cpp
@@ -39,7 +39,7 @@ TREFile::~TREFile()
 
 bool TREFile::init()
 {
-	Handle hdl;
+	Handle hdl(this);
 	quint8 locked;
 	quint16 hdrLen;
 
@@ -113,7 +113,7 @@ bool TREFile::init()
 
 bool TREFile::load(int idx)
 {
-	Handle hdl;
+	Handle hdl(this);
 	QList<SubDiv*> sl;
 	SubDiv *s = 0;
 	SubDivTree *tree = new SubDivTree();
@@ -199,7 +199,7 @@ bool TREFile::load(int idx)
 			if (i)
 				sl.at(i-1)->setExtEnds(polygons, lines, points);
 
-			if (!seek(hdl, hdl.pos + _extended.itemSize - 12))
+			if (!seek(hdl, hdl.pos() + _extended.itemSize - 12))
 				goto error;
 		}
 
diff --git a/src/map/IMG/trefile.h b/src/map/IMG/trefile.h
index 88159de5..6d16c003 100644
--- a/src/map/IMG/trefile.h
+++ b/src/map/IMG/trefile.h
@@ -14,6 +14,7 @@ class TREFile : public SubFile
 {
 public:
 	TREFile(IMG *img) : SubFile(img) {}
+	TREFile(const QString &path) : SubFile(path) {}
 	TREFile(SubFile *gmp, quint32 offset) : SubFile(gmp, offset) {}
 	~TREFile();
 
diff --git a/src/map/IMG/vectortile.cpp b/src/map/IMG/vectortile.cpp
index 56945f5f..64e8c2dc 100644
--- a/src/map/IMG/vectortile.cpp
+++ b/src/map/IMG/vectortile.cpp
@@ -59,6 +59,29 @@ SubFile *VectorTile::addFile(IMG *img, SubFile::Type type)
 	}
 }
 
+SubFile *VectorTile::addFile(const QString &path, SubFile::Type type)
+{
+	switch (type) {
+		case SubFile::TRE:
+			_tre = new TREFile(path);
+			return _tre;
+		case SubFile::RGN:
+			_rgn = new RGNFile(path);
+			return _rgn;
+		case SubFile::LBL:
+			_lbl = new LBLFile(path);
+			return _lbl;
+		case SubFile::NET:
+			_net = new NETFile(path);
+			return _net;
+		case SubFile::GMP:
+			_gmp = new SubFile(path);
+			return _gmp;
+		default:
+			return 0;
+	}
+}
+
 bool VectorTile::init()
 {
 	if (_gmp && !initGMP())
@@ -72,7 +95,7 @@ bool VectorTile::init()
 
 bool VectorTile::initGMP()
 {
-	SubFile::Handle hdl;
+	SubFile::Handle hdl(_gmp);
 	quint32 tre, rgn, lbl, net;
 
 	if (!(_gmp->seek(hdl, 0x19) && _gmp->readUInt32(hdl, tre)
@@ -92,7 +115,7 @@ void VectorTile::polys(const RectC &rect, int bits, QList<IMG::Poly> *polygons,
   QList<IMG::Poly> *lines, QCache<const SubDiv *, IMG::Polys> *polyCache)
   const
 {
-	SubFile::Handle rgnHdl, lblHdl, netHdl;
+	SubFile::Handle rgnHdl(_rgn), lblHdl(_lbl), netHdl(_net);
 
 	if (!_rgn->initialized() && !_rgn->init(rgnHdl))
 		return;
@@ -131,7 +154,7 @@ void VectorTile::polys(const RectC &rect, int bits, QList<IMG::Poly> *polygons,
 void VectorTile::points(const RectC &rect, int bits, QList<IMG::Point> *points,
   QCache<const SubDiv *, QList<IMG::Point> > *pointCache) const
 {
-	SubFile::Handle rgnHdl, lblHdl;
+	SubFile::Handle rgnHdl(_rgn), lblHdl(_lbl);
 
 	if (!_rgn->initialized() && !_rgn->init(rgnHdl))
 		return;
diff --git a/src/map/IMG/vectortile.h b/src/map/IMG/vectortile.h
index 76f39061..8ac84f4d 100644
--- a/src/map/IMG/vectortile.h
+++ b/src/map/IMG/vectortile.h
@@ -23,6 +23,7 @@ public:
 
 	SubFile *file(SubFile::Type type);
 	SubFile *addFile(IMG *img, SubFile::Type type);
+	SubFile *addFile(const QString &path, SubFile::Type type);
 
 	void polys(const RectC &rect, int bits, QList<IMG::Poly> *polygons,
 	  QList<IMG::Poly> *lines, QCache<const SubDiv *, IMG::Polys> *polyCache)
@@ -37,8 +38,6 @@ public:
 		  || type == SubFile::GMP);
 	}
 
-	friend QDebug operator<<(QDebug dbg, const VectorTile &tile);
-
 private:
 	bool initGMP();
 
diff --git a/src/map/imgmap.cpp b/src/map/imgmap.cpp
index 038c145b..5ea914b7 100644
--- a/src/map/imgmap.cpp
+++ b/src/map/imgmap.cpp
@@ -13,6 +13,9 @@
 #include "IMG/textpathitem.h"
 #include "IMG/textpointitem.h"
 #include "IMG/bitmapline.h"
+#include "IMG/style.h"
+#include "IMG/img.h"
+#include "IMG/gmap.h"
 #include "pcs.h"
 #include "rectd.h"
 #include "imgmap.h"
@@ -35,9 +38,9 @@ public:
 	const QString &key() const {return _key;}
 	const QPoint &xy() const {return _xy;}
 	QImage &img() {return _img;}
-	QList<IMG::Poly> &polygons() {return _polygons;}
-	QList<IMG::Poly> &lines() {return _lines;}
-	QList<IMG::Point> &points() {return _points;}
+	QList<MapData::Poly> &polygons() {return _polygons;}
+	QList<MapData::Poly> &lines() {return _lines;}
+	QList<MapData::Point> &points() {return _points;}
 
 	void render()
 	{
@@ -70,9 +73,9 @@ private:
 	QPoint _xy;
 	QString _key;
 	QImage _img;
-	QList<IMG::Poly> _polygons;
-	QList<IMG::Poly> _lines;
-	QList<IMG::Point> _points;
+	QList<MapData::Poly> _polygons;
+	QList<MapData::Poly> _lines;
+	QList<MapData::Point> _points;
 };
 
 
@@ -226,11 +229,17 @@ static bool rectNearPolygon(const QPolygonF &polygon, const QRectF &rect)
 	  || polygon.containsPoint(rect.bottomRight(), Qt::OddEvenFill)));
 }
 
+
 IMGMap::IMGMap(const QString &fileName, QObject *parent)
-  : Map(parent), _img(fileName), _projection(PCS::pcs(3857)), _valid(false)
+  : Map(parent), _projection(PCS::pcs(3857)), _valid(false)
 {
-	if (!_img.isValid()) {
-		_errorString = _img.errorString();
+	if (GMAP::isGMAP(fileName))
+		_data = new GMAP(fileName);
+	else
+		_data = new IMG(fileName);
+
+	if (!_data->isValid()) {
+		_errorString = _data->errorString();
 		return;
 	}
 
@@ -242,17 +251,17 @@ IMGMap::IMGMap(const QString &fileName, QObject *parent)
 
 void IMGMap::load()
 {
-	_img.load();
+	_data->load();
 }
 
 void IMGMap::unload()
 {
-	_img.clear();
+	_data->clear();
 }
 
 QRectF IMGMap::bounds()
 {
-	RectD prect(_img.bounds(), _projection);
+	RectD prect(_data->bounds(), _projection);
 	return QRectF(_transform.proj2img(prect.topLeft()),
 	  _transform.proj2img(prect.bottomRight()));
 }
@@ -302,7 +311,7 @@ Transform IMGMap::transform(int zoom) const
 {
 	double scale = _projection.isGeographic()
 	  ? 360.0 / (1<<zoom) : (2.0 * M_PI * WGS84_RADIUS) / (1<<zoom);
-	PointD topLeft(_projection.ll2xy(_img.bounds().topLeft()));
+	PointD topLeft(_projection.ll2xy(_data->bounds().topLeft()));
 	return Transform(ReferencePoint(PointD(0, 0), topLeft),
 	  PointD(scale, scale));
 }
@@ -322,14 +331,14 @@ Coordinates IMGMap::xy2ll(const QPointF &p)
 	return _projection.xy2ll(_transform.img2proj(p));
 }
 
-void IMGMap::drawPolygons(QPainter *painter, const QList<IMG::Poly> &polygons)
+void IMGMap::drawPolygons(QPainter *painter, const QList<MapData::Poly> &polygons)
 {
-	for (int n = 0; n < _img.style()->drawOrder().size(); n++) {
+	for (int n = 0; n < _data->style()->drawOrder().size(); n++) {
 		for (int i = 0; i < polygons.size(); i++) {
-			const IMG::Poly &poly = polygons.at(i);
-			if (poly.type != _img.style()->drawOrder().at(n))
+			const MapData::Poly &poly = polygons.at(i);
+			if (poly.type != _data->style()->drawOrder().at(n))
 				continue;
-			const Style::Polygon &style = _img.style()->polygon(poly.type);
+			const Style::Polygon &style = _data->style()->polygon(poly.type);
 
 			painter->setPen(style.pen());
 			painter->setBrush(style.brush());
@@ -338,13 +347,13 @@ void IMGMap::drawPolygons(QPainter *painter, const QList<IMG::Poly> &polygons)
 	}
 }
 
-void IMGMap::drawLines(QPainter *painter, const QList<IMG::Poly> &lines)
+void IMGMap::drawLines(QPainter *painter, const QList<MapData::Poly> &lines)
 {
 	painter->setBrush(Qt::NoBrush);
 
 	for (int i = 0; i < lines.size(); i++) {
-		const IMG::Poly &poly = lines.at(i);
-		const Style::Line &style = _img.style()->line(poly.type);
+		const MapData::Poly &poly = lines.at(i);
+		const Style::Line &style = _data->style()->line(poly.type);
 
 		if (style.background() == Qt::NoPen)
 			continue;
@@ -354,8 +363,8 @@ void IMGMap::drawLines(QPainter *painter, const QList<IMG::Poly> &lines)
 	}
 
 	for (int i = 0; i < lines.size(); i++) {
-		const IMG::Poly &poly = lines.at(i);
-		const Style::Line &style = _img.style()->line(poly.type);
+		const MapData::Poly &poly = lines.at(i);
+		const Style::Line &style = _data->style()->line(poly.type);
 
 		if (!style.img().isNull())
 			BitmapLine::draw(painter, poly.points, style.img());
@@ -372,12 +381,11 @@ void IMGMap::drawTextItems(QPainter *painter, const QList<TextItem*> &textItems)
 		textItems.at(i)->paint(painter);
 }
 
-
-void IMGMap::processPolygons(QList<IMG::Poly> &polygons,
+void IMGMap::processPolygons(QList<MapData::Poly> &polygons,
   QList<TextItem*> &textItems)
 {
 	for (int i = 0; i < polygons.size(); i++) {
-		IMG::Poly &poly = polygons[i];
+		MapData::Poly &poly = polygons[i];
 		for (int j = 0; j < poly.points.size(); j++) {
 			QPointF &p = poly.points[j];
 			p = ll2xy(Coordinates(p.x(), p.y()));
@@ -389,7 +397,7 @@ void IMGMap::processPolygons(QList<IMG::Poly> &polygons,
 		if (_zoom <= 23 && (Style::isWaterArea(poly.type)
 		  || Style::isMilitaryArea(poly.type)
 		  || Style::isNatureReserve(poly.type))) {
-			const Style::Polygon &style = _img.style()->polygon(poly.type);
+			const Style::Polygon &style = _data->style()->polygon(poly.type);
 			TextPointItem *item = new TextPointItem(
 			  centroid(poly.points).toPoint(), &poly.label.text(),
 			  poiFont(), 0, &style.brush().color());
@@ -402,13 +410,13 @@ void IMGMap::processPolygons(QList<IMG::Poly> &polygons,
 	}
 }
 
-void IMGMap::processLines(QList<IMG::Poly> &lines, const QRect &tileRect,
+void IMGMap::processLines(QList<MapData::Poly> &lines, const QRect &tileRect,
   QList<TextItem*> &textItems)
 {
 	qStableSort(lines);
 
 	for (int i = 0; i < lines.size(); i++) {
-		IMG::Poly &poly = lines[i];
+		MapData::Poly &poly = lines[i];
 		for (int j = 0; j < poly.points.size(); j++) {
 			QPointF &p = poly.points[j];
 			p = ll2xy(Coordinates(p.x(), p.y()));
@@ -420,12 +428,12 @@ void IMGMap::processLines(QList<IMG::Poly> &lines, const QRect &tileRect,
 	processShields(lines, tileRect, textItems);
 }
 
-void IMGMap::processStreetNames(QList<IMG::Poly> &lines, const QRect &tileRect,
-  QList<TextItem*> &textItems)
+void IMGMap::processStreetNames(QList<MapData::Poly> &lines,
+  const QRect &tileRect, QList<TextItem*> &textItems)
 {
 	for (int i = 0; i < lines.size(); i++) {
-		IMG::Poly &poly = lines[i];
-		const Style::Line &style = _img.style()->line(poly.type);
+		MapData::Poly &poly = lines[i];
+		const Style::Line &style = _data->style()->line(poly.type);
 
 		if (style.img().isNull() && style.foreground() == Qt::NoPen)
 			continue;
@@ -449,7 +457,7 @@ void IMGMap::processStreetNames(QList<IMG::Poly> &lines, const QRect &tileRect,
 	}
 }
 
-void IMGMap::processShields(QList<IMG::Poly> &lines, const QRect &tileRect,
+void IMGMap::processShields(QList<MapData::Poly> &lines, const QRect &tileRect,
   QList<TextItem*> &textItems)
 {
 	for (int type = FIRST_SHIELD; type <= LAST_SHIELD; type++) {
@@ -460,7 +468,7 @@ void IMGMap::processShields(QList<IMG::Poly> &lines, const QRect &tileRect,
 		QHash<Label::Shield, const Label::Shield*> sp;
 
 		for (int i = 0; i < lines.size(); i++) {
-			const IMG::Poly &poly = lines.at(i);
+			const MapData::Poly &poly = lines.at(i);
 			const Label::Shield &shield = poly.label.shield();
 			if (!shield.isValid() || shield.type() != type
 			  || !Style::isMajorRoad(poly.type))
@@ -513,14 +521,14 @@ void IMGMap::processShields(QList<IMG::Poly> &lines, const QRect &tileRect,
 	}
 }
 
-void IMGMap::processPoints(QList<IMG::Point> &points,
+void IMGMap::processPoints(QList<MapData::Point> &points,
   QList<TextItem*> &textItems)
 {
 	qSort(points);
 
 	for (int i = 0; i < points.size(); i++) {
-		IMG::Point &point = points[i];
-		const Style::Point &style = _img.style()->point(point.type);
+		MapData::Point &point = points[i];
+		const Style::Point &style = _data->style()->point(point.type);
 
 		if (point.poi && _zoom < minPOIZoom(Style::poiClass(point.type)))
 			continue;
@@ -574,7 +582,7 @@ void IMGMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 		for (int j = 0; j < height; j++) {
 			QPixmap pm;
 			QPoint ttl(tl.x() + i * TILE_SIZE, tl.y() + j * TILE_SIZE);
-			QString key = _img.fileName() + "-" + QString::number(_zoom) + "_"
+			QString key = _data->fileName() + "-" + QString::number(_zoom) + "_"
 			  + QString::number(ttl.x()) + "_" + QString::number(ttl.y());
 			if (QPixmapCache::find(key, pm))
 				painter->drawPixmap(ttl, pm);
@@ -584,13 +592,13 @@ void IMGMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
 
 				RectD polyRect(_transform.img2proj(ttl), _transform.img2proj(
 				  QPointF(ttl.x() + TILE_SIZE, ttl.y() + TILE_SIZE)));
-				_img.polys(polyRect.toRectC(_projection, 4), _zoom,
+				_data->polys(polyRect.toRectC(_projection, 4), _zoom,
 				  &(tile.polygons()), &(tile.lines()));
 
 				RectD pointRect(_transform.img2proj(QPointF(ttl.x() - TEXT_EXTENT,
 				  ttl.y() - TEXT_EXTENT)), _transform.img2proj(QPointF(ttl.x()
 				  + TILE_SIZE + TEXT_EXTENT, ttl.y() + TILE_SIZE + TEXT_EXTENT)));
-				_img.points(pointRect.toRectC(_projection, 4), _zoom,
+				_data->points(pointRect.toRectC(_projection, 4), _zoom,
 				  &(tile.points()));
 			}
 		}
diff --git a/src/map/imgmap.h b/src/map/imgmap.h
index 36b7dee8..03dec65b 100644
--- a/src/map/imgmap.h
+++ b/src/map/imgmap.h
@@ -4,7 +4,7 @@
 #include "map.h"
 #include "projection.h"
 #include "transform.h"
-#include "IMG/img.h"
+#include "IMG/mapdata.h"
 
 class TextItem;
 
@@ -14,8 +14,9 @@ class IMGMap : public Map
 
 public:
 	IMGMap(const QString &fileName, QObject *parent = 0);
+	~IMGMap() {delete _data;}
 
-	QString name() const {return _img.name();}
+	QString name() const {return _data->name();}
 
 	QRectF bounds();
 
@@ -43,21 +44,21 @@ private:
 
 	Transform transform(int zoom) const;
 	void updateTransform();
-	void drawPolygons(QPainter *painter, const QList<IMG::Poly> &polygons);
-	void drawLines(QPainter *painter, const QList<IMG::Poly> &lines);
+	void drawPolygons(QPainter *painter, const QList<MapData::Poly> &polygons);
+	void drawLines(QPainter *painter, const QList<MapData::Poly> &lines);
 	void drawTextItems(QPainter *painter, const QList<TextItem*> &textItems);
 
-	void processPolygons(QList<IMG::Poly> &polygons,
+	void processPolygons(QList<MapData::Poly> &polygons,
 	  QList<TextItem *> &textItems);
-	void processLines(QList<IMG::Poly> &lines, const QRect &tileRect,
+	void processLines(QList<MapData::Poly> &lines, const QRect &tileRect,
 	  QList<TextItem*> &textItems);
-	void processPoints(QList<IMG::Point> &points, QList<TextItem*> &textItems);
-	void processShields(QList<IMG::Poly> &lines, const QRect &tileRect,
+	void processPoints(QList<MapData::Point> &points, QList<TextItem*> &textItems);
+	void processShields(QList<MapData::Poly> &lines, const QRect &tileRect,
 	  QList<TextItem*> &textItems);
-	void processStreetNames(QList<IMG::Poly> &lines, const QRect &tileRect,
+	void processStreetNames(QList<MapData::Poly> &lines, const QRect &tileRect,
 	  QList<TextItem*> &textItems);
 
-	IMG _img;
+	MapData *_data;
 	int _zoom;
 	Projection _projection;
 	Transform _transform;
diff --git a/src/map/maplist.cpp b/src/map/maplist.cpp
index aebcd5d7..91f8b610 100644
--- a/src/map/maplist.cpp
+++ b/src/map/maplist.cpp
@@ -8,20 +8,27 @@
 #include "mbtilesmap.h"
 #include "rmap.h"
 #include "imgmap.h"
+#include "IMG/gmap.h"
 #include "maplist.h"
 
 
-bool MapList::loadMap(Map* map, const QString &path, bool dir)
+bool MapList::loadMap(Map *map, const QString &path, bool dir)
 {
-	if (map->isValid()) {
+	if (map && map->isValid()) {
 		_maps.append(map);
 		return true;
-	} else {
+	} else if (map) {
 		if (dir)
 			_errorString += path + ": " + map->errorString() + "\n";
 		else
 			_errorString = map->errorString();
 		return false;
+	} else {
+		if (dir)
+			_errorString += path + ": " + "Unknown map format\n";
+		else
+			_errorString = "Unknown map format";
+		return false;
 	}
 }
 
@@ -41,18 +48,22 @@ Map *MapList::loadSource(const QString &path, bool dir)
 	return map;
 }
 
-bool MapList::loadFile(const QString &path, bool *atlas, bool dir)
+bool MapList::loadFile(const QString &path, bool *terminate, bool dir)
 {
 	QFileInfo fi(path);
 	QString suffix = fi.suffix().toLower();
-	Map *map;
+	Map *map = 0;
 
 	if (Atlas::isAtlas(path)) {
-		*atlas = true;
+		*terminate = true;
 		map = new Atlas(path, this);
 	} else if (suffix == "xml") {
-		if (!(map = loadSource(path, dir)))
+		if (MapSource::isMap(path) && !(map = loadSource(path, dir)))
 			return false;
+		else if (GMAP::isGMAP(path)) {
+			*terminate = true;
+			map = new IMGMap(path);
+		}
 	} else if (suffix == "jnx")
 		map = new JNXMap(path, this);
 	else if (suffix == "tif" || suffix == "tiff")
@@ -85,15 +96,15 @@ bool MapList::loadDirR(const QString &path)
 	for (int i = 0; i < ml.size(); i++) {
 		const QFileInfo &fi = ml.at(i);
 		QString suffix = fi.suffix().toLower();
-		bool atlas = false;
+		bool terminate = false;
 
 		if (fi.isDir() && fi.fileName() != "set") {
 			if (!loadDirR(fi.absoluteFilePath()))
 				ret = false;
 		} else if (filter().contains("*." + suffix)) {
-			if (!loadFile(fi.absoluteFilePath(), &atlas, true))
+			if (!loadFile(fi.absoluteFilePath(), &terminate, true))
 				ret = false;
-			if (atlas)
+			if (terminate)
 				break;
 		}
 	}
@@ -120,7 +131,7 @@ QString MapList::formats()
 	return
 	  tr("Supported files")
 	  + " (*.img *.jnx *.map *.mbtiles *.rmap *.rtmap *.tar *.tba *.tif *.tiff *.xml);;"
-	  + tr("Garmin IMG maps") + " (*.img);;"
+	  + tr("Garmin IMG maps") + " (*.img *.xml);;"
 	  + tr("Garmin JNX maps") + " (*.jnx);;"
 	  + tr("OziExplorer maps") + " (*.map);;"
 	  + tr("MBTiles maps") + " (*.mbtiles);;"
diff --git a/src/map/maplist.h b/src/map/maplist.h
index 87426a90..394738ab 100644
--- a/src/map/maplist.h
+++ b/src/map/maplist.h
@@ -23,7 +23,7 @@ public:
 	static QStringList filter();
 
 private:
-	bool loadFile(const QString &path, bool *atlas, bool dir);
+	bool loadFile(const QString &path, bool *terminate, bool dir);
 	bool loadDirR(const QString &path);
 	Map *loadSource(const QString &path, bool dir);
 	bool loadMap(Map *map, const QString &path, bool dir);
diff --git a/src/map/mapsource.cpp b/src/map/mapsource.cpp
index 5b18875c..c881b9b4 100644
--- a/src/map/mapsource.cpp
+++ b/src/map/mapsource.cpp
@@ -222,6 +222,20 @@ void MapSource::map(QXmlStreamReader &reader, Config &config)
 	}
 }
 
+bool MapSource::isMap(const QString &path)
+{
+	QFile file(path);
+
+	if (!file.open(QFile::ReadOnly | QFile::Text))
+		return false;
+
+	QXmlStreamReader reader(&file);
+	if (reader.readNextStartElement() && reader.name() == "map")
+		return true;
+
+	return false;
+}
+
 Map *MapSource::loadMap(const QString &path, QString &errorString)
 {
 	Config config;
diff --git a/src/map/mapsource.h b/src/map/mapsource.h
index ee6f0c89..abeecdd6 100644
--- a/src/map/mapsource.h
+++ b/src/map/mapsource.h
@@ -15,6 +15,7 @@ class MapSource
 {
 public:
 	static Map *loadMap(const QString &path, QString &errorString);
+	static bool isMap(const QString &path);
 
 private:
 	enum Type {