Switched to XML defined online map sources

pkg/gpxsee.nsi

@@ -83,7 +83,7 @@ Section "GPXSee" SEC_APP
   
   ; Put the files there
   File "gpxsee.exe"
-  File "maps.txt"
+  File "maps.xml"
   File "ellipsoids.csv"
   File "gcs.csv"
   File "pcs.csv"

pkg/gpxsee64.nsi

@@ -90,7 +90,7 @@ Section "GPXSee" SEC_APP
   
   ; Put the files there
   File "gpxsee.exe"
-  File "maps.txt"
+  File "maps.xml"
   File "ellipsoids.csv"
   File "gcs.csv"
   File "pcs.csv"

pkg/maps.txt

@@ -1,5 +0,0 @@
-Open Topo Map	https://a.tile.opentopomap.org/$z/$x/$y.png	17
-4UMaps	http://4umaps.eu/$z/$x/$y.png	15
-Open Street Map	http://tile.openstreetmap.org/$z/$x/$y.png	19
-USGS Topo	https://navigator.er.usgs.gov/tiles/tcr.cgi/$z/$x/$y.png	15
-USGS Imagery	https://navigator.er.usgs.gov/tiles/aerial_Imagery.cgi/$z/$x/$y	15

pkg/maps.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<omd>
+	<map>
+		<name>Open Topo Map</name>
+		<url>https://a.tile.opentopomap.org/$z/$x/$y.png</url>
+		<zoom max="17"/>
+	</map>
+	<map>
+		<name>4UMaps</name>
+		<url>http://4umaps.eu/$z/$x/$y.png</url>
+		<zoom min="2" max="15"/>
+		<bounds bottom="-65"/>
+	</map>
+	<map>
+		<name>Open Street Map</name>
+		<url>http://tile.openstreetmap.org/$z/$x/$y.png</url>
+	</map>
+	<map>
+		<name>USGS Topo</name>
+		<url>https://navigator.er.usgs.gov/tiles/tcr.cgi/$z/$x/$y.png</url>
+		<zoom min="2" max="15"/>
+	</map>
+	<map>
+		<name>USGS Imagery</name>
+		<url>https://navigator.er.usgs.gov/tiles/aerial_Imagery.cgi/$z/$x/$y</url>
+		<zoom min="2" max="15"/>
+	</map>
+</omd>