diff --git a/MapProjections/Shared/Ed50UtmProjection.cs b/MapProjections/Shared/Ed50UtmProjection.cs
index ed3e39ed..114d2044 100644
--- a/MapProjections/Shared/Ed50UtmProjection.cs
+++ b/MapProjections/Shared/Ed50UtmProjection.cs
@@ -45,7 +45,7 @@ namespace MapControl.Projections
                 + "AXIS[\"Northing\",NORTH],"
                 + "AUTHORITY[\"EPSG\",\"230{0}\"]]";
 
-            WKT = string.Format(wktFormat, zone, 6 * zone - 183);
+            CoordinateSystemWkt = string.Format(wktFormat, zone, 6 * zone - 183);
         }
     }
 }
diff --git a/MapProjections/Shared/Etrs89UtmProjection.cs b/MapProjections/Shared/Etrs89UtmProjection.cs
index d1117098..2a704654 100644
--- a/MapProjections/Shared/Etrs89UtmProjection.cs
+++ b/MapProjections/Shared/Etrs89UtmProjection.cs
@@ -45,7 +45,7 @@ namespace MapControl.Projections
                 + "AXIS[\"Northing\",NORTH],"
                 + "AUTHORITY[\"EPSG\",\"258{0}\"]]";
 
-            WKT = string.Format(wktFormat, zone, 6 * zone - 183);
+            CoordinateSystemWkt = string.Format(wktFormat, zone, 6 * zone - 183);
         }
     }
 }
diff --git a/MapProjections/Shared/GeoApiProjection.cs b/MapProjections/Shared/GeoApiProjection.cs
index 65b8a873..0eb9391d 100644
--- a/MapProjections/Shared/GeoApiProjection.cs
+++ b/MapProjections/Shared/GeoApiProjection.cs
@@ -32,9 +32,9 @@ namespace MapControl.Projections
         {
         }
 
-        public GeoApiProjection(string wkt)
+        public GeoApiProjection(string coordinateSystemWkt)
         {
-            WKT = wkt;
+            CoordinateSystemWkt = coordinateSystemWkt;
         }
 
         /// <summary>
@@ -42,7 +42,7 @@ namespace MapControl.Projections
         /// i.e. a PROJCS[...] or GEOGCS[...] string as used by https://epsg.io or http://spatialreference.org.
         /// Setting this property updates the CoordinateSystem property with an ICoordinateSystem created from the WKT string.
         /// </summary>
-        public string WKT
+        public string CoordinateSystemWkt
         {
             get { return CoordinateSystem?.WKT; }
             protected set { CoordinateSystem = new CoordinateSystemFactory().CreateFromWkt(value); }
diff --git a/MapProjections/Shared/GeoApiProjectionFactory.cs b/MapProjections/Shared/GeoApiProjectionFactory.cs
index c215d82c..65060eef 100644
--- a/MapProjections/Shared/GeoApiProjectionFactory.cs
+++ b/MapProjections/Shared/GeoApiProjectionFactory.cs
@@ -2,6 +2,8 @@
 // © 2022 Clemens Fischer
 // Licensed under the Microsoft Public License (Ms-PL)
 
+using System.Collections.Generic;
+
 namespace MapControl.Projections
 {
     public class GeoApiProjectionFactory : MapProjectionFactory
@@ -19,11 +21,17 @@ namespace MapControl.Projections
         public const int Wgs84UtmSouthLast = 32760;
         public const int Wgs84UpsSouth = 32761;
 
+        public Dictionary<string, string> CoordinateSystemWkts { get; } = new Dictionary<string, string>();
+
         public override MapProjection GetProjection(string crsId)
         {
             MapProjection projection = null;
 
-            if (crsId.StartsWith("EPSG:") && int.TryParse(crsId.Substring(5), out int epsgCode))
+            if (CoordinateSystemWkts.TryGetValue(crsId, out string wkt))
+            {
+                projection = new GeoApiProjection(wkt);
+            }
+            else if (crsId.StartsWith("EPSG:") && int.TryParse(crsId.Substring(5), out int epsgCode))
             {
                 switch (epsgCode)
                 {
diff --git a/MapProjections/Shared/WorldMercatorProjection.cs b/MapProjections/Shared/WorldMercatorProjection.cs
index 381fca56..bb3adc7b 100644
--- a/MapProjections/Shared/WorldMercatorProjection.cs
+++ b/MapProjections/Shared/WorldMercatorProjection.cs
@@ -17,7 +17,8 @@ namespace MapControl.Projections
     {
         public WorldMercatorProjection()
         {
-            WKT = "PROJCS[\"WGS 84 / World Mercator\","
+            CoordinateSystemWkt
+                = "PROJCS[\"WGS 84 / World Mercator\","
                 + "GEOGCS[\"WGS 84\","
                 + "DATUM[\"WGS_1984\","
                 + "SPHEROID[\"WGS 84\",6378137,298.257223563,"