diff --git a/src/map/IMG/img.cpp b/src/map/IMG/img.cpp
index 7ffc4f38..3dcc20a2 100644
--- a/src/map/IMG/img.cpp
+++ b/src/map/IMG/img.cpp
@@ -7,12 +7,6 @@
 
 #define CACHE_SIZE 8388608 /* 8MB */
 
-#define CHECK(condition) \
-	if (!(condition)) { \
-		_errorString = "Unsupported or invalid IMG file"; \
-		return; \
-	}
-
 struct CTX
 {
 	CTX(const RectC &rect, int bits, QList<IMG::Poly> *polygons,
@@ -27,9 +21,37 @@ struct CTX
 	QList<IMG::Point> *points;
 };
 
+static SubFile::Type tileType(const char str[3])
+{
+	if (!memcmp(str, "TRE", 3))
+		return SubFile::TRE;
+	else if (!memcmp(str, "RGN", 3))
+		return SubFile::RGN;
+	else if (!memcmp(str, "LBL", 3))
+		return SubFile::LBL;
+	else if (!memcmp(str, "TYP", 3))
+		return SubFile::TYP;
+	else if (!memcmp(str, "GMP", 3))
+		return SubFile::GMP;
+	else if (!memcmp(str, "NET", 3))
+		return SubFile::NET;
+	else
+		return SubFile::Unknown;
+}
+
 IMG::IMG(const QString &fileName)
   : _file(fileName), _typ(0), _style(0), _valid(false)
 {
+#define CHECK(condition) \
+	if (!(condition)) { \
+		_errorString = "Unsupported or invalid IMG file"; \
+		qDeleteAll(tileMap); \
+		return; \
+	}
+
+	QMap<QString, VectorTile*> tileMap;
+	QString typFile;
+
 	if (!_file.open(QFile::ReadOnly)) {
 		_errorString = _file.errorString();
 		return;
@@ -75,19 +97,15 @@ IMG::IMG(const QString &fileName)
 	offset += 512;
 	int cnt = (size - offset) / 512;
 
-
-	QMap<QString, VectorTile*> tileMap;
-	QString typFile;
-
 	// Read FAT blocks describing the IMG sub-files
 	for (int i = 0; i < cnt; i++) {
 		quint16 block;
 		CHECK(_file.seek(offset) && readValue(flag) && read(name, sizeof(name))
 		  && read(type, sizeof(type)) && readValue(size) && readValue(part));
-		SubFile::Type tt = SubFile::type(type);
+		SubFile::Type tt = tileType(type);
 
 		QString fn(QByteArray(name, sizeof(name)));
-		if (SubFile::isTileFile(tt)) {
+		if (VectorTile::isTileFile(tt)) {
 			VectorTile *tile;
 			QMap<QString, VectorTile*>::iterator it = tileMap.find(fn);
 			if (it == tileMap.end()) {
@@ -166,7 +184,7 @@ void IMG::load()
 		_style = new Style(_typ);
 	else {
 		QFile typFile(ProgramPaths::typFile());
-		if (typFile.exists()) {
+		if (typFile.open(QIODevice::ReadOnly)) {
 			SubFile typ(&typFile);
 			_style = new Style(&typ);
 		} else
diff --git a/src/map/IMG/img.h b/src/map/IMG/img.h
index 925963e9..55cf3151 100644
--- a/src/map/IMG/img.h
+++ b/src/map/IMG/img.h
@@ -1,14 +1,12 @@
 #ifndef IMG_H
 #define IMG_H
 
-#include <QRect>
 #include <QFile>
 #include <QByteArray>
 #include <QCache>
 #include <QDebug>
 #include "common/rtree.h"
 #include "common/rectc.h"
-#include "common/range.h"
 #include "style.h"
 #include "label.h"
 
diff --git a/src/map/IMG/subfile.cpp b/src/map/IMG/subfile.cpp
index d653d28b..589697bf 100644
--- a/src/map/IMG/subfile.cpp
+++ b/src/map/IMG/subfile.cpp
@@ -2,35 +2,9 @@
 #include "img.h"
 #include "subfile.h"
 
-SubFile::Type SubFile::type(const char str[3])
-{
-	if (!memcmp(str, "TRE", 3))
-		return TRE;
-	else if (!memcmp(str, "RGN", 3))
-		return RGN;
-	else if (!memcmp(str, "LBL", 3))
-		return LBL;
-	else if (!memcmp(str, "TYP", 3))
-		return TYP;
-	else if (!memcmp(str, "GMP", 3))
-		return GMP;
-	else if (!memcmp(str, "NET", 3))
-		return NET;
-	else
-		return Unknown;
-}
-
-SubFile::SubFile(QFile *file) :_gmpOffset(0), _img(0), _file(file), _blocks(0)
-{
-	if (!_file->open(QIODevice::ReadOnly))
-		qWarning("Error opening %s: %s", qPrintable(_file->fileName()),
-		  qPrintable(_file->errorString()));
-}
 
 bool SubFile::seek(Handle &handle, quint32 pos) const
 {
-	Q_ASSERT(_img || _file);
-
 	if (_file)
 		return _file->seek(pos);
 	else {
@@ -54,8 +28,6 @@ bool SubFile::seek(Handle &handle, quint32 pos) const
 
 bool SubFile::readByte(Handle &handle, quint8 &val) const
 {
-	Q_ASSERT(_img || _file);
-
 	if (_file)
 		return _file->getChar((char*)&val);
 	else {
@@ -101,20 +73,3 @@ QString SubFile::fileName() const
 {
 	return _file ? _file->fileName() : _img->fileName();
 }
-
-#ifndef QT_NO_DEBUG
-QDebug operator<<(QDebug dbg, const SubFile &file)
-{
-	bool continuous = true;
-	for (int i = 1; i < file._blocks->size(); i++) {
-		if (file._blocks->at(i) != file._blocks->at(i-1) + 1) {
-			continuous = false;
-			break;
-		}
-	}
-
-	dbg.nospace() << "SubFile(" << file._blocks->size() << ", "
-	  << continuous << ")";
-	return dbg.space();
-}
-#endif // QT_NO_DEBUG
diff --git a/src/map/IMG/subfile.h b/src/map/IMG/subfile.h
index 55b2535a..5245f339 100644
--- a/src/map/IMG/subfile.h
+++ b/src/map/IMG/subfile.h
@@ -22,11 +22,17 @@ public:
 		int pos;
 	};
 
-	SubFile(IMG *img) : _gmpOffset(0), _img(img), _file(0),
-	  _blocks(&_blockData) {}
+	SubFile(IMG *img)
+	  : _gmpOffset(0), _img(img), _blocks(new QVector<quint16>()), _file(0) {}
 	SubFile(SubFile *gmp, quint32 offset) : _gmpOffset(offset), _img(gmp->_img),
-	  _file(0), _blocks(&(gmp->_blockData)) {}
-	SubFile(QFile *file);
+	  _blocks(gmp->_blocks), _file(gmp->_file) {}
+	SubFile(QFile *file)
+	  : _gmpOffset(0), _img(0), _blocks(0), _file(file) {}
+	~SubFile()
+	{
+		if (!_gmpOffset)
+			delete _blocks;
+	}
 
 	void addBlock(quint16 block) {_blocks->append(block);}
 
@@ -86,27 +92,13 @@ public:
 	quint16 offset() const {return _blocks->first();}
 	QString fileName() const;
 
-	static Type type(const char str[3]);
-	static bool isTileFile(Type type)
-	{
-		return (type == TRE || type == LBL || type == RGN || type == NET
-		  || type == GMP);
-	}
-
-	friend QDebug operator<<(QDebug dbg, const SubFile &file);
-
 protected:
 	quint32 _gmpOffset;
 
 private:
 	IMG *_img;
-	QFile *_file;
 	QVector<quint16> *_blocks;
-	QVector<quint16> _blockData;
+	QFile *_file;
 };
 
-#ifndef QT_NO_DEBUG
-QDebug operator<<(QDebug dbg, const SubFile &file);
-#endif // QT_NO_DEBUG
-
 #endif // SUBFILE_H
diff --git a/src/map/IMG/vectortile.cpp b/src/map/IMG/vectortile.cpp
index ee721d2d..070a9348 100644
--- a/src/map/IMG/vectortile.cpp
+++ b/src/map/IMG/vectortile.cpp
@@ -85,16 +85,7 @@ void VectorTile::objects(const RectC &rect, int bits,
 #ifndef QT_NO_DEBUG
 QDebug operator<<(QDebug dbg, const VectorTile &tile)
 {
-	dbg.nospace() << "VectorTile(";
-	if (tile._tre)
-		dbg << "TRE: " << *(tile._tre);
-	if (tile._rgn)
-		dbg << ", RGN: " << *(tile._rgn);
-	if (tile._lbl)
-		dbg << ", LBL: " << *(tile._lbl);
-	if (tile._net)
-		dbg << ", NET: " << *(tile._net);
-	dbg << ")";
+	dbg.nospace() << "VectorTile(" << tile.bounds() <<")";
 
 	return dbg.space();
 }
diff --git a/src/map/IMG/vectortile.h b/src/map/IMG/vectortile.h
index 101d0cc2..423550db 100644
--- a/src/map/IMG/vectortile.h
+++ b/src/map/IMG/vectortile.h
@@ -25,6 +25,13 @@ public:
 	void objects(const RectC &rect, int bits, QList<IMG::Poly> *polygons,
 	  QList<IMG::Poly> *lines, QList<IMG::Point> *points) const;
 
+	static bool isTileFile(SubFile::Type type)
+	{
+		return (type == SubFile::TRE || type == SubFile::LBL
+		  || type == SubFile::RGN || type == SubFile::NET
+		  || type == SubFile::GMP);
+	}
+
 	friend QDebug operator<<(QDebug dbg, const VectorTile &tile);
 
 private:
diff --git a/src/map/imgmap.cpp b/src/map/imgmap.cpp
index 70940c9c..dc8f660f 100644
--- a/src/map/imgmap.cpp
+++ b/src/map/imgmap.cpp
@@ -1,5 +1,6 @@
 #include <QFile>
 #include <QPainter>
+#include <QFont>
 #include <QPixmapCache>
 #if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
 #include <QtCore>
diff --git a/src/map/imgmap.h b/src/map/imgmap.h
index b83d07df..2dfbd7dd 100644
--- a/src/map/imgmap.h
+++ b/src/map/imgmap.h
@@ -1,7 +1,6 @@
 #ifndef IMGMAP_H
 #define IMGMAP_H
 
-#include <QFont>
 #include "map.h"
 #include "projection.h"
 #include "transform.h"