diff --git a/src/GUI/pluginparameters.cpp b/src/GUI/pluginparameters.cpp
index 222ebcea..95cce959 100644
--- a/src/GUI/pluginparameters.cpp
+++ b/src/GUI/pluginparameters.cpp
@@ -2,12 +2,6 @@
 #include <QLineEdit>
 #include "pluginparameters.h"
 
-static const QMap<QString, QStringList> pluginParams = {
-	{"nmea", {"nmea.source", "nmea.baudrate"}},
-	{"serialnmea", {"serialnmea.serial_port"}},
-	{"geoclue2", {"desktopId"}}
-};
-
 static void deleteLayout(QLayout *layout)
 {
 	if (!layout)
@@ -32,6 +26,12 @@ PluginParameters::PluginParameters(const QString &plugin,
 
 void PluginParameters::setPlugin(const QString &plugin)
 {
+	static const QMap<QString, QStringList> pluginParams = {
+		{"nmea", {"nmea.source", "nmea.baudrate"}},
+		{"serialnmea", {"serialnmea.serial_port"}},
+		{"geoclue2", {"desktopId"}}
+	};
+
 	saveParameters();
 
 	QStringList params = pluginParams.value(plugin);
diff --git a/src/map/ENC/iso8211.cpp b/src/map/ENC/iso8211.cpp
index b81585c0..1ae28bc8 100644
--- a/src/map/ENC/iso8211.cpp
+++ b/src/map/ENC/iso8211.cpp
@@ -323,7 +323,7 @@ bool ISO8211::readRecord(Record &record)
 		const FieldDefinition &def = fields.at(i);
 		Data data;
 
-		FieldsMap::const_iterator it = _map.find(def.tag);
+		FieldsMap::const_iterator it(_map.find(def.tag));
 		if (it == _map.constEnd()) {
 			_errorString = QString("%1: unknown record").arg(QString(def.tag));
 			return false;
diff --git a/src/map/ENC/mapdata.cpp b/src/map/ENC/mapdata.cpp
index 644b7a08..c460a087 100644
--- a/src/map/ENC/mapdata.cpp
+++ b/src/map/ENC/mapdata.cpp
@@ -86,7 +86,7 @@ static QMap<uint,uint> orderMap = orderMapInit();
 static uint order(uint type)
 {
 	uint st = ((type>>16) == BUAARE) ? type : (type & 0xFFFF0000);
-	QMap<uint, uint>::const_iterator it = orderMap.find(st);
+	QMap<uint, uint>::const_iterator it(orderMap.find(st));
 	return (it == orderMap.constEnd()) ? (type>>16) + 512 : it.value();
 }
 
diff --git a/src/map/ENC/rastertile.cpp b/src/map/ENC/rastertile.cpp
index 6bd38977..0f20b9d2 100644
--- a/src/map/ENC/rastertile.cpp
+++ b/src/map/ENC/rastertile.cpp
@@ -15,7 +15,8 @@ using namespace ENC;
 typedef QSet<Coordinates> PointSet;
 
 static const float C1 = 0.866025f; /* sqrt(3)/2 */
-static const QColor haloColor(Qt::white);
+static const QColor tsslptPen = QColor("#eb49eb");
+static const QColor tsslptBrush = QColor("#80eb49eb");
 
 static const Style *style()
 {
@@ -174,8 +175,8 @@ void RasterTile::drawArrows(QPainter *painter,
 			QPolygonF polygon(tsslptArrow(centroid(poly.path().first()),
 			  deg2rad(180 - poly.param().toDouble())));
 
-			painter->setPen(QPen(QColor("#eb49eb"), 1));
-			painter->setBrush(QBrush("#80eb49eb"));
+			painter->setPen(QPen(tsslptPen, 1));
+			painter->setBrush(QBrush(tsslptBrush));
 			painter->drawPolygon(polygon);
 		}
 	}
diff --git a/src/map/ENC/style.cpp b/src/map/ENC/style.cpp
index a9f0d2c8..bb6b0f09 100644
--- a/src/map/ENC/style.cpp
+++ b/src/map/ENC/style.cpp
@@ -344,7 +344,7 @@ const Style::Line &Style::line(uint type) const
 {
 	static Line null;
 
-	QMap<uint, Line>::const_iterator it = _lines.find(type);
+	QMap<uint, Line>::const_iterator it(_lines.find(type));
 	return (it == _lines.constEnd()) ? null : *it;
 }
 
@@ -352,7 +352,7 @@ const Style::Polygon &Style::polygon(uint type) const
 {
 	static Polygon null;
 
-	QMap<uint, Polygon>::const_iterator it = _polygons.find(type);
+	QMap<uint, Polygon>::const_iterator it(_polygons.find(type));
 	return (it == _polygons.constEnd()) ? null : *it;
 }
 
@@ -360,7 +360,7 @@ const Style::Point &Style::point(uint type) const
 {
 	static Point null;
 
-	QMap<uint, Point>::const_iterator it = _points.find(type);
+	QMap<uint, Point>::const_iterator it(_points.find(type));
 	return (it == _points.constEnd()) ? null : *it;
 }
 
diff --git a/src/map/ENC/style.h b/src/map/ENC/style.h
index 642e89f9..065bfeac 100644
--- a/src/map/ENC/style.h
+++ b/src/map/ENC/style.h
@@ -111,6 +111,7 @@ private:
 	QMap<uint, Point> _points;
 	QVector<uint> _drawOrder;
 
+	/* Fonts and images must be initialized after QGuiApplication! */
 	QFont _small, _normal, _large;
 	QImage _light, _signal;
 };
diff --git a/src/map/IMG/imgdata.cpp b/src/map/IMG/imgdata.cpp
index 55b9435e..81672b3a 100644
--- a/src/map/IMG/imgdata.cpp
+++ b/src/map/IMG/imgdata.cpp
@@ -105,7 +105,7 @@ bool IMGData::readFAT(QFile &file, TileMap &tileMap)
 		QByteArray fn(name, sizeof(name));
 		if (VectorTile::isTileFile(tt)) {
 			VectorTile *tile;
-			TileMap::const_iterator it = tileMap.find(fn);
+			TileMap::const_iterator it(tileMap.find(fn));
 			if (it == tileMap.constEnd()) {
 				tile = new VectorTile();
 				tileMap.insert(fn, tile);
diff --git a/src/map/IMG/rastertile.cpp b/src/map/IMG/rastertile.cpp
index 3c7bb86a..8e6b8695 100644
--- a/src/map/IMG/rastertile.cpp
+++ b/src/map/IMG/rastertile.cpp
@@ -1,7 +1,6 @@
 #include <QFont>
 #include <QPainter>
 #include <QCache>
-#include "map/imgmap.h"
 #include "map/textpathitem.h"
 #include "map/textpointitem.h"
 #include "map/bitmapline.h"
diff --git a/src/map/IMG/style.cpp b/src/map/IMG/style.cpp
index 784559c6..5f7b8129 100644
--- a/src/map/IMG/style.cpp
+++ b/src/map/IMG/style.cpp
@@ -1250,7 +1250,7 @@ const Style::Line &Style::line(quint32 type) const
 {
 	static Line null;
 
-	QMap<quint32, Line>::const_iterator it = _lines.find(type);
+	QMap<quint32, Line>::const_iterator it(_lines.find(type));
 	return (it == _lines.constEnd()) ? null : *it;
 }
 
@@ -1258,7 +1258,7 @@ const Style::Polygon &Style::polygon(quint32 type) const
 {
 	static Polygon null;
 
-	QMap<quint32, Polygon>::const_iterator it = _polygons.find(type);
+	QMap<quint32, Polygon>::const_iterator it(_polygons.find(type));
 	return (it == _polygons.constEnd()) ? null : *it;
 }
 
@@ -1266,7 +1266,7 @@ const Style::Point &Style::point(quint32 type) const
 {
 	static Point null;
 
-	QMap<quint32, Point>::const_iterator it = _points.find(type);
+	QMap<quint32, Point>::const_iterator it(_points.find(type));
 	return (it == _points.constEnd()) ? null : *it;
 }
 
diff --git a/src/map/IMG/style.h b/src/map/IMG/style.h
index 8a5665c1..1e3775ea 100644
--- a/src/map/IMG/style.h
+++ b/src/map/IMG/style.h
@@ -176,6 +176,7 @@ private:
 	QMap<quint32, Point> _points;
 	QList<quint32> _drawOrder;
 
+	/* Fonts and images must be initialized after QGuiApplication! */
 	QFont _large, _normal, _small, _extraSmall;
 };
 
diff --git a/src/map/conversion.cpp b/src/map/conversion.cpp
index 054f5db6..ce177c22 100644
--- a/src/map/conversion.cpp
+++ b/src/map/conversion.cpp
@@ -99,7 +99,7 @@ QMap<int, Conversion::Entry> Conversion::defaults()
 
 Conversion Conversion::conversion(int id)
 {
-	QMap<int, Entry>::const_iterator it = _conversions.find(id);
+	QMap<int, Entry>::const_iterator it(_conversions.find(id));
 
 	if (it == _conversions.constEnd())
 		return Conversion();
@@ -189,7 +189,7 @@ QList<KV<int, QString> > Conversion::list()
 	QList<KV<int, QString> > list;
 
 	for (QMap<int, Entry>::const_iterator it = _conversions.constBegin();
-		 it != _conversions.constEnd(); ++it)
+	  it != _conversions.constEnd(); ++it)
 		list.append(KV<int, QString>(it.key(), it.value().name()));
 
 	return list;
diff --git a/src/map/pcs.cpp b/src/map/pcs.cpp
index d9210499..f5f3a1b5 100644
--- a/src/map/pcs.cpp
+++ b/src/map/pcs.cpp
@@ -1,6 +1,5 @@
 #include <QFile>
 #include "common/csv.h"
-#include "angularunits.h"
 #include "pcs.h"
 
 QMap<int, PCS::Entry> PCS::_pcss = defaults();
@@ -14,7 +13,7 @@ QMap<int, PCS::Entry> PCS::defaults()
 
 PCS PCS::pcs(int id)
 {
-	QMap<int, Entry>::const_iterator it = _pcss.find(id);
+	QMap<int, Entry>::const_iterator it(_pcss.find(id));
 
 	if (it == _pcss.constEnd())
 		return PCS();
diff --git a/src/map/rmap.cpp b/src/map/rmap.cpp
index 2cf4767f..b63d6215 100644
--- a/src/map/rmap.cpp
+++ b/src/map/rmap.cpp
@@ -5,7 +5,6 @@
 #include <QRegularExpression>
 #include <QtEndian>
 #include "common/rectc.h"
-#include "common/wgs84.h"
 #include "common/color.h"
 #include "calibrationpoint.h"
 #include "utm.h"
diff --git a/src/map/textpointitem.h b/src/map/textpointitem.h
index a42ffb03..7bd53ef2 100644
--- a/src/map/textpointitem.h
+++ b/src/map/textpointitem.h
@@ -1,6 +1,7 @@
 #ifndef TEXTPOINTITEM_H
 #define TEXTPOINTITEM_H
 
+#include <cmath>
 #include "textitem.h"
 
 class QFont;
diff --git a/src/map/tileloader.cpp b/src/map/tileloader.cpp
index 036ae439..e10b7e9f 100644
--- a/src/map/tileloader.cpp
+++ b/src/map/tileloader.cpp
@@ -110,8 +110,8 @@ void TileLoader::loadTilesSync(QVector<Tile> &list)
 
 		for (int i = 0; i < tl.size(); i++) {
 			Tile *t = tl[i];
-			QString file = tileFile(*t);
-			if (QFileInfo(file).exists())
+			QString file(tileFile(*t));
+			if (QFileInfo::exists(file))
 				t->setFile(file);
 		}
 	}
diff --git a/src/map/transform.cpp b/src/map/transform.cpp
index ec84ee74..59313b04 100644
--- a/src/map/transform.cpp
+++ b/src/map/transform.cpp
@@ -1,4 +1,3 @@
-#include "projection.h"
 #include "matrix.h"
 #include "transform.h"
 
diff --git a/src/map/wms.cpp b/src/map/wms.cpp
index ba336abc..63f88baf 100644
--- a/src/map/wms.cpp
+++ b/src/map/wms.cpp
@@ -321,7 +321,7 @@ bool WMS::parseCapabilities()
 
 void WMS::capabilitiesReady()
 {
-	if (!QFileInfo(_path).exists()) {
+	if (!QFileInfo::exists(_path)) {
 		_errorString = "Error downloading capabilities XML file";
 		_valid = false;
 	} else {
@@ -338,7 +338,7 @@ WMS::WMS(const QString &file, const WMS::Setup &setup, QObject *parent)
 	QString url = QString("%1%2service=WMS&request=GetCapabilities")
 	  .arg(setup.url(), setup.url().contains('?') ? "&" : "?");
 
-	if (!QFileInfo(file).exists()) {
+	if (!QFileInfo::exists(file)) {
 		Downloader *downloader = new Downloader(this);
 		connect(downloader, &Downloader::finished, this,
 		  &WMS::capabilitiesReady);
diff --git a/src/map/wmts.cpp b/src/map/wmts.cpp
index 14f112bd..02d0a770 100644
--- a/src/map/wmts.cpp
+++ b/src/map/wmts.cpp
@@ -6,7 +6,6 @@
 #include <QStringList>
 #include <QtAlgorithms>
 #include <QXmlStreamReader>
-#include "pcs.h"
 #include "crs.h"
 #include "wmts.h"
 
@@ -301,7 +300,7 @@ bool WMTS::parseCapabilities(CTX &ctx)
 
 void WMTS::capabilitiesReady()
 {
-	if (!QFileInfo(_path).exists()) {
+	if (!QFileInfo::exists(_path)) {
 		_errorString = "Error downloading capabilities XML file";
 		_valid = false;
 	} else {
@@ -354,7 +353,7 @@ WMTS::WMTS(const QString &file, const WMTS::Setup &setup, QObject *parent)
 
 	_path = url.isLocalFile() ? url.toLocalFile() : file;
 
-	if (!url.isLocalFile() && !QFileInfo(file).exists()) {
+	if (!url.isLocalFile() && !QFileInfo::exists(file)) {
 		Downloader *downloader = new Downloader(this);
 		connect(downloader, &Downloader::finished, this,
 		  &WMTS::capabilitiesReady);