diff --git a/MapProjections/Shared/Ed50UtmProjection.cs b/MapProjections/Shared/Ed50UtmProjection.cs
index cf69d653..8c68a666 100644
--- a/MapProjections/Shared/Ed50UtmProjection.cs
+++ b/MapProjections/Shared/Ed50UtmProjection.cs
@@ -24,21 +24,16 @@ namespace MapControl.Projections
             Zone = zone;
             CoordinateSystemWkt
                 = $"PROJCS[\"ED50 / UTM zone {zone}N\","
-                + "GEOGCS[\"ED50\","
-                + "DATUM[\"European_Datum_1950\","
-                + "SPHEROID[\"International 1924\",6378388,297],TOWGS84[-87,-98,-121,0,0,0,0]],"
-                + ProjNetMapProjectionFactory.PrimeMeridianGreenwich + ","
-                + ProjNetMapProjectionFactory.UnitDegree + ","
-                + "AUTHORITY[\"EPSG\",\"4230\"]],"
-                + ProjNetMapProjectionFactory.ProjectionTransverseMercator + ","
+                + WktConstants.GeoGcsEd50 + ","
+                + "PROJECTION[\"Transverse_Mercator\"],"
                 + "PARAMETER[\"latitude_of_origin\",0],"
                 + $"PARAMETER[\"central_meridian\",{6 * zone - 183}],"
                 + "PARAMETER[\"scale_factor\",0.9996],"
                 + "PARAMETER[\"false_easting\",500000],"
                 + "PARAMETER[\"false_northing\",0],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
-                + ProjNetMapProjectionFactory.AxisEasting + ","
-                + ProjNetMapProjectionFactory.AxisNorthing + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                + "AXIS[\"Easting\",EAST],"
+                + "AXIS[\"Northing\",NORTH],"
                 + $"AUTHORITY[\"EPSG\",\"230{zone:00}\"]]";
         }
     }
diff --git a/MapProjections/Shared/Etrs89UtmProjection.cs b/MapProjections/Shared/Etrs89UtmProjection.cs
index 5b4bc531..385171d9 100644
--- a/MapProjections/Shared/Etrs89UtmProjection.cs
+++ b/MapProjections/Shared/Etrs89UtmProjection.cs
@@ -24,16 +24,16 @@ namespace MapControl.Projections
             Zone = zone;
             CoordinateSystemWkt
                 = $"PROJCS[\"ETRS89 / UTM zone {zone}N\","
-                + ProjNetMapProjectionFactory.GeoGcsEtrs89 + ","
-                + ProjNetMapProjectionFactory.ProjectionTransverseMercator + ","
+                + WktConstants.GeoGcsEtrs89 + ","
+                + "PROJECTION[\"Transverse_Mercator\"],"
                 + "PARAMETER[\"latitude_of_origin\",0],"
                 + $"PARAMETER[\"central_meridian\",{6 * zone - 183}],"
                 + "PARAMETER[\"scale_factor\",0.9996],"
                 + "PARAMETER[\"false_easting\",500000],"
                 + "PARAMETER[\"false_northing\",0],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
-                + ProjNetMapProjectionFactory.AxisEasting + ","
-                + ProjNetMapProjectionFactory.AxisNorthing + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                + "AXIS[\"Easting\",EAST],"
+                + "AXIS[\"Northing\",NORTH],"
                 + $"AUTHORITY[\"EPSG\",\"258{zone:00}\"]]";
         }
     }
diff --git a/MapProjections/Shared/Nad27UtmProjection.cs b/MapProjections/Shared/Nad27UtmProjection.cs
index e81fc5d2..c3fc2140 100644
--- a/MapProjections/Shared/Nad27UtmProjection.cs
+++ b/MapProjections/Shared/Nad27UtmProjection.cs
@@ -24,21 +24,16 @@ namespace MapControl.Projections
             Zone = zone;
             CoordinateSystemWkt
                 = $"PROJCS[\"NAD27 / UTM zone {zone}N\","
-                + "GEOGCS[\"NAD27\","
-                + "DATUM[\"North_American_Datum_1927\","
-                + "SPHEROID[\"Clarke 1866\",6378206.4,294.978698213898]],"
-                + ProjNetMapProjectionFactory.PrimeMeridianGreenwich + ","
-                + ProjNetMapProjectionFactory.UnitDegree + ","
-                + "AUTHORITY[\"EPSG\",\"4267\"]],"
-                + ProjNetMapProjectionFactory.ProjectionTransverseMercator + ","
+                + WktConstants.GeoGcsNad27 + ","
+                + "PROJECTION[\"Transverse_Mercator\"],"
                 + "PARAMETER[\"latitude_of_origin\",0],"
                 + $"PARAMETER[\"central_meridian\",{6 * zone - 183}],"
                 + "PARAMETER[\"scale_factor\",0.9996],"
                 + "PARAMETER[\"false_easting\",500000],"
                 + "PARAMETER[\"false_northing\",0],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
-                + ProjNetMapProjectionFactory.AxisEasting + ","
-                + ProjNetMapProjectionFactory.AxisNorthing + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                + "AXIS[\"Easting\",EAST],"
+                + "AXIS[\"Northing\",NORTH],"
                 + $"AUTHORITY[\"EPSG\",\"267{zone:00}\"]]";
         }
     }
diff --git a/MapProjections/Shared/Nad83UtmProjection.cs b/MapProjections/Shared/Nad83UtmProjection.cs
index 43623eb9..4e83b925 100644
--- a/MapProjections/Shared/Nad83UtmProjection.cs
+++ b/MapProjections/Shared/Nad83UtmProjection.cs
@@ -24,21 +24,16 @@ namespace MapControl.Projections
             Zone = zone;
             CoordinateSystemWkt
                 = $"PROJCS[\"NAD83 / UTM zone {zone}N\","
-                + "GEOGCS[\"NAD83\","
-                + "DATUM[\"North_American_Datum_1983\","
-                + "SPHEROID[\"GRS 1980\",6378137,298.257222101]],"
-                + ProjNetMapProjectionFactory.PrimeMeridianGreenwich + ","
-                + ProjNetMapProjectionFactory.UnitDegree + ","
-                + "AUTHORITY[\"EPSG\",\"4269\"]],"
-                + ProjNetMapProjectionFactory.ProjectionTransverseMercator + ","
+                + WktConstants.GeoGcsNad83 + ","
+                + "PROJECTION[\"Transverse_Mercator\"],"
                 + "PARAMETER[\"latitude_of_origin\",0],"
                 + $"PARAMETER[\"central_meridian\",{6 * zone - 183}],"
                 + "PARAMETER[\"scale_factor\",0.9996],"
                 + "PARAMETER[\"false_easting\",500000],"
                 + "PARAMETER[\"false_northing\",0],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
-                + ProjNetMapProjectionFactory.AxisEasting + ","
-                + ProjNetMapProjectionFactory.AxisNorthing + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                + "AXIS[\"Easting\",EAST],"
+                + "AXIS[\"Northing\",NORTH],"
                 + $"AUTHORITY[\"EPSG\",\"269{zone:00}\"]]";
         }
     }
diff --git a/MapProjections/Shared/ProjNetMapProjectionFactory.cs b/MapProjections/Shared/ProjNetMapProjectionFactory.cs
index 6142f2b9..5a7433a4 100644
--- a/MapProjections/Shared/ProjNetMapProjectionFactory.cs
+++ b/MapProjections/Shared/ProjNetMapProjectionFactory.cs
@@ -4,245 +4,229 @@ namespace MapControl.Projections
 {
     public class ProjNetMapProjectionFactory : MapProjectionFactory
     {
-        internal const string SpheroidWgs84 = "SPHEROID[\"WGS 84\",6378137,298.257223563]";
-        internal const string SpheroidGrs1980 = "SPHEROID[\"GRS 1980\",6378137,298.257222101]";
-        internal const string SpheroidGrs1967Modified = "SPHEROID[\"GRS 1967 Modified\",6378160,298.25]";
-        internal const string PrimeMeridianGreenwich = "PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]]";
-        internal const string UnitDegree = "UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]]";
-        internal const string UnitMeter = "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]]";
-        internal const string ProjectionTransverseMercator = "PROJECTION[\"Transverse_Mercator\"]";
-        internal const string ProjectionLambertConformalConic = "PROJECTION[\"Lambert_Conformal_Conic_2SP\"]";
-        internal const string AxisEasting = "AXIS[\"Easting\",EAST]";
-        internal const string AxisNorthing = "AXIS[\"Northing\",NORTH]";
-
-        internal const string GeoGcsWgs84
-            = "GEOGCS[\"WGS 84\","
-            + "DATUM[\"WGS_1984\","
-            + SpheroidWgs84 + "],"
-            + PrimeMeridianGreenwich + ","
-            + UnitDegree + ","
-            + "AUTHORITY[\"EPSG\",\"4326\"]]";
-
-        internal const string GeoGcsEtrs89
-            = "GEOGCS[\"ETRS89\","
-            + "DATUM[\"European_Terrestrial_Reference_System_1989\","
-            + SpheroidGrs1980 + "],"
-            + PrimeMeridianGreenwich + ","
-            + UnitDegree + ","
-            + "AUTHORITY[\"EPSG\",\"4258\"]]";
-
-        internal const string GeoGcsGgrs87
-            = "GEOGCS[\"GGRS87\","
-            + "DATUM[\"Greek_Geodetic_Reference_System_1987\","
-            + SpheroidGrs1980 + ",TOWGS84[-199.87,74.79,246.62,0,0,0,0]],"
-            + PrimeMeridianGreenwich + ","
-            + UnitDegree + ","
-            + "AUTHORITY[\"EPSG\",\"4121\"]]";
-
-        internal const string GeoGcsEtrf2000Pl
-            = "GEOGCS[\"ETRF2000-PL\","
-            + "DATUM[\"ETRF2000_Poland\","
-            + SpheroidGrs1980 + "],"
-            + PrimeMeridianGreenwich + ","
-            + UnitDegree + ","
-            + "AUTHORITY[\"EPSG\",\"9702\"]]";
-
-        internal const string GeoGcsSad69A
-            = "GEOGCS[\"SAD69\","
-            + "DATUM[\"South_American_Datum_1969\","
-            + SpheroidGrs1967Modified + ",TOWGS84[-57,1,-41,0,0,0,0]],"
-            + PrimeMeridianGreenwich + ","
-            + UnitDegree + ","
-            + "AUTHORITY[\"EPSG\",\"4618\"]]";
-
-        internal const string GeoGcsSad69B
-            = "GEOGCS[\"SAD69\","
-            + "DATUM[\"South_American_Datum_1969\","
-            + SpheroidGrs1967Modified + ",TOWGS84[-67.35,3.88,-38.22,0,0,0,0]],"
-            + PrimeMeridianGreenwich + ","
-            + UnitDegree + ","
-            + "AUTHORITY[\"EPSG\",\"4618\"]]";
-
         public Dictionary<int, string> CoordinateSystemWkts { get; } = new Dictionary<int, string>
         {
             {
                 2100, "PROJCS[\"GGRS87 / Greek Grid\","
-                    + GeoGcsGgrs87 + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsGgrs87 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",24],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",0],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"2100\"]]"
             },
             {
                 2180, "PROJCS[\"ETRF2000-PL / CS92\","
-                    + GeoGcsEtrf2000Pl + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsEtrf2000Pl + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",19],"
                     + "PARAMETER[\"scale_factor\",0.9993],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",-5300000],"
-                    + UnitMeter + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
                     + "AUTHORITY[\"EPSG\",\"2180\"]]"
             },
             {
                 4647, "PROJCS[\"ETRS89 / UTM zone 32N (zE-N)\","
-                    + GeoGcsEtrs89 + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsEtrs89 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",9],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",32500000],"
                     + "PARAMETER[\"false_northing\",0],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"4647\"]]"
             },
             {
                 29187, "PROJCS[\"SAD69 / UTM zone 17S\","
-                    + GeoGcsSad69A + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-81],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29187\"]]"
             },
             {
                 29188, "PROJCS[\"SAD69 / UTM zone 18S\","
-                    + GeoGcsSad69A + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-75],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29188\"]]"
             },
             {
                 29189, "PROJCS[\"SAD69 / UTM zone 19S\","
-                    + GeoGcsSad69A + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-69],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29189\"]]"
             },
             {
                 29190, "PROJCS[\"SAD69 / UTM zone 20S\","
-                    + GeoGcsSad69A + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-63],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29190\"]]"
             },
             {
                 29191, "PROJCS[\"SAD69 / UTM zone 21S\","
-                    + GeoGcsSad69A + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-57],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29191\"]]"
             },
             {
                 29192, "PROJCS[\"SAD69 / UTM zone 22S\","
-                    + GeoGcsSad69B + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69_96 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-51],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29192\"]]"
             },
             {
                 29193, "PROJCS[\"SAD69 / UTM zone 23S\","
-                    + GeoGcsSad69B + ","
-                    + ProjectionTransverseMercator + ","
+                    + WktConstants.GeoGcsSad69_96 + ","
+                    + "PROJECTION[\"Transverse_Mercator\"],"
                     + "PARAMETER[\"latitude_of_origin\",0],"
                     + "PARAMETER[\"central_meridian\",-45],"
                     + "PARAMETER[\"scale_factor\",0.9996],"
                     + "PARAMETER[\"false_easting\",500000],"
                     + "PARAMETER[\"false_northing\",10000000],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"29193\"]]"
             },
             {
                 3034, "PROJCS[\"ETRS89-extended / LCC Europe\","
-                    + GeoGcsEtrs89 + ","
-                    + ProjectionLambertConformalConic + ","
+                    + WktConstants.GeoGcsEtrs89 + ","
+                    + "PROJECTION[\"Lambert_Conformal_Conic_2SP\"],"
                     + "PARAMETER[\"latitude_of_origin\",52],"
                     + "PARAMETER[\"central_meridian\",10],"
                     + "PARAMETER[\"standard_parallel_1\",35],"
                     + "PARAMETER[\"standard_parallel_2\",65],"
                     + "PARAMETER[\"false_easting\",4000000],"
                     + "PARAMETER[\"false_northing\",2800000],"
-                    + UnitMeter + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
                     + "AUTHORITY[\"EPSG\",\"3034\"]]"
             },
+            {
+                3035, "PROJCS[\"ETRS89-extended / LAEA Europe\","
+                    + WktConstants.GeoGcsEtrs89 + ","
+                    + "PROJECTION[\"Lambert_Azimuthal_Equal_Area\"],"
+                    + "PARAMETER[\"latitude_of_center\",52],"
+                    + "PARAMETER[\"longitude_of_center\",10],"
+                    + "PARAMETER[\"false_easting\",4321000],"
+                    + "PARAMETER[\"false_northing\",3210000]"
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AUTHORITY[\"EPSG\",\"3035\"]]"
+            },
             {
                 4839, "PROJCS[\"ETRS89 / LCC Germany (N-E)\","
-                    + GeoGcsEtrs89 + ","
-                    + ProjectionLambertConformalConic + ","
+                    + WktConstants.GeoGcsEtrs89 + ","
+                    + "PROJECTION[\"Lambert_Conformal_Conic_2SP\"],"
                     + "PARAMETER[\"latitude_of_origin\",51],"
                     + "PARAMETER[\"central_meridian\",10.5],"
                     + "PARAMETER[\"standard_parallel_1\",48.6666666666667],"
                     + "PARAMETER[\"standard_parallel_2\",53.6666666666667],"
                     + "PARAMETER[\"false_easting\",0],"
                     + "PARAMETER[\"false_northing\",0],"
-                    + UnitMeter + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
                     + "AUTHORITY[\"EPSG\",\"4839\"]]"
             },
             {
                 5243, "PROJCS[\"ETRS89 / LCC Germany (E-N)\","
-                    + GeoGcsEtrs89 + ","
-                    + ProjectionLambertConformalConic + ","
+                    + WktConstants.GeoGcsEtrs89 + ","
+                    + "PROJECTION[\"Lambert_Conformal_Conic_2SP\"],"
                     + "PARAMETER[\"latitude_of_origin\",51],"
                     + "PARAMETER[\"central_meridian\",10.5],"
                     + "PARAMETER[\"standard_parallel_1\",48.6666666666667],"
                     + "PARAMETER[\"standard_parallel_2\",53.6666666666667],"
                     + "PARAMETER[\"false_easting\",0],"
                     + "PARAMETER[\"false_northing\",0],"
-                    + UnitMeter + ","
-                    + AxisEasting + ","
-                    + AxisNorthing + ","
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
                     + "AUTHORITY[\"EPSG\",\"5243\"]]"
+            },
+            {
+                21781, "PROJCS[\"CH1903 / LV03\","
+                    + WktConstants.GeoGcsCh1903 + ","
+                    + "PROJECTION[\"Hotine_Oblique_Mercator_Azimuth_Center\"],"
+                    + "PARAMETER[\"latitude_of_center\",46.9524055555556],"
+                    + "PARAMETER[\"longitude_of_center\",7.43958333333333],"
+                    + "PARAMETER[\"azimuth\",90],"
+                    + "PARAMETER[\"rectified_grid_angle\",90],"
+                    + "PARAMETER[\"scale_factor\",1],"
+                    + "PARAMETER[\"false_easting\",600000],"
+                    + "PARAMETER[\"false_northing\",200000],"
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
+                    + "AUTHORITY[\"EPSG\",\"21781\"]]"
+            },
+            {
+                2056, "PROJCS[\"CH1903 / LV95\","
+                    + WktConstants.GeoGcsCh1903 + ","
+                    + "PROJECTION[\"Hotine_Oblique_Mercator_Azimuth_Center\"],"
+                    + "PARAMETER[\"latitude_of_center\",46.9524055555556],"
+                    + "PARAMETER[\"longitude_of_center\",7.43958333333333],"
+                    + "PARAMETER[\"azimuth\",90],"
+                    + "PARAMETER[\"rectified_grid_angle\",90],"
+                    + "PARAMETER[\"scale_factor\",1],"
+                    + "PARAMETER[\"false_easting\",2600000],"
+                    + "PARAMETER[\"false_northing\",1200000],"
+                    + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                    + "AXIS[\"Easting\",EAST],"
+                    + "AXIS[\"Northing\",NORTH],"
+                    + "AUTHORITY[\"EPSG\",\"2056\"]]"
             }
         };
 
diff --git a/MapProjections/Shared/Wgs84UpsProjections.cs b/MapProjections/Shared/Wgs84UpsProjections.cs
index 867fc710..6229cf75 100644
--- a/MapProjections/Shared/Wgs84UpsProjections.cs
+++ b/MapProjections/Shared/Wgs84UpsProjections.cs
@@ -12,14 +12,14 @@ namespace MapControl.Projections
         {
             CoordinateSystemWkt
                 = "PROJCS[\"WGS 84 / UPS North (N,E)\","
-                + ProjNetMapProjectionFactory.GeoGcsWgs84 + ","
+                + WktConstants.GeoGcsWgs84 + ","
                 + "PROJECTION[\"Polar_Stereographic\"],"
                 + "PARAMETER[\"latitude_of_origin\",90],"
                 + "PARAMETER[\"central_meridian\",0],"
                 + "PARAMETER[\"scale_factor\",0.994],"
                 + "PARAMETER[\"false_easting\",2000000],"
                 + "PARAMETER[\"false_northing\",2000000],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
                 + "AUTHORITY[\"EPSG\",\"32661\"]]";
 
             Type = MapProjectionType.Azimuthal;
@@ -39,14 +39,14 @@ namespace MapControl.Projections
         {
             CoordinateSystemWkt
                 = "PROJCS[\"WGS 84 / UPS South (N,E)\","
-                + ProjNetMapProjectionFactory.GeoGcsWgs84 + ","
+                + WktConstants.GeoGcsWgs84 + ","
                 + "PROJECTION[\"Polar_Stereographic\"],"
                 + "PARAMETER[\"latitude_of_origin\",-90],"
                 + "PARAMETER[\"central_meridian\",0],"
                 + "PARAMETER[\"scale_factor\",0.994],"
                 + "PARAMETER[\"false_easting\",2000000],"
                 + "PARAMETER[\"false_northing\",2000000],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
                 + "AUTHORITY[\"EPSG\",\"32761\"]]";
 
             Type = MapProjectionType.Azimuthal;
diff --git a/MapProjections/Shared/WktConstants.cs b/MapProjections/Shared/WktConstants.cs
new file mode 100644
index 00000000..0f4f9d61
--- /dev/null
+++ b/MapProjections/Shared/WktConstants.cs
@@ -0,0 +1,100 @@
+namespace MapControl.Projections
+{
+    public static class WktConstants
+    {
+        private const string PrimeMeridian = "PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],";
+        private const string UnitDegree = "UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],";
+
+        public const string SpheroidWgs84 = "SPHEROID[\"WGS 84\",6378137,298.257223563]";
+        public const string SpheroidGrs1980 = "SPHEROID[\"GRS 1980\",6378137,298.257222101]";
+        public const string SpheroidGrs1967Modified = "SPHEROID[\"GRS 1967 Modified\",6378160,298.25]";
+        public const string SpheroidInternational1924 = "SPHEROID[\"International 1924\",6378388,297]";
+        public const string SpheroidClarke1866 = "SPHEROID[\"Clarke 1866\",6378206.4,294.978698213898]";
+        public const string SpheroidBessel1841 = "SPHEROID[\"Bessel 1841\",6377397.155,299.1528128]";
+
+        public const string GeoGcsWgs84
+            = "GEOGCS[\"WGS 84\","
+            + "DATUM[\"WGS_1984\","
+            + SpheroidWgs84 + "],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4326\"]]";
+
+        public const string GeoGcsEd50
+            = "GEOGCS[\"ED50\","
+            + "DATUM[\"European_Datum_1950\","
+            + SpheroidInternational1924 + ","
+            + "TOWGS84[-87,-98,-121,0,0,0,0]],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4230\"]]";
+
+        public const string GeoGcsEtrs89
+            = "GEOGCS[\"ETRS89\","
+            + "DATUM[\"European_Terrestrial_Reference_System_1989\","
+            + SpheroidGrs1980 + "],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4258\"]]";
+
+        public const string GeoGcsGgrs87
+            = "GEOGCS[\"GGRS87\","
+            + "DATUM[\"Greek_Geodetic_Reference_System_1987\","
+            + SpheroidGrs1980 + ","
+            + "TOWGS84[-199.87,74.79,246.62,0,0,0,0]],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4121\"]]";
+
+        public const string GeoGcsEtrf2000Pl
+            = "GEOGCS[\"ETRF2000-PL\","
+            + "DATUM[\"ETRF2000_Poland\","
+            + SpheroidGrs1980 + "],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"9702\"]]";
+
+        public const string GeoGcsNad83
+            = "GEOGCS[\"NAD83\","
+            + "DATUM[\"North_American_Datum_1983\","
+            + SpheroidGrs1980 + "],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4269\"]]";
+
+        public const string GeoGcsNad27
+            = "GEOGCS[\"NAD27\","
+            + "DATUM[\"North_American_Datum_1927\","
+            + SpheroidClarke1866 + "],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4267\"]]";
+
+        public const string GeoGcsSad69
+            = "GEOGCS[\"SAD69\","
+            + "DATUM[\"South_American_Datum_1969\","
+            + SpheroidGrs1967Modified + ","
+            + "TOWGS84[-57,1,-41,0,0,0,0]],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4618\"]]";
+
+        public const string GeoGcsSad69_96
+            = "GEOGCS[\"SAD69\","
+            + "DATUM[\"South_American_Datum_1969_96\","
+            + SpheroidGrs1967Modified + ","
+            + "TOWGS84[-67.35,3.88,-38.22,0,0,0,0]],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"5527\"]]";
+
+        public const string GeoGcsCh1903
+            = "GEOGCS[\"CH1903\","
+            + "DATUM[\"CH1903\","
+            + SpheroidBessel1841 + ","
+            + "TOWGS84[674.374,15.056,405.346,0,0,0,0]],"
+            + PrimeMeridian
+            + UnitDegree
+            + "AUTHORITY[\"EPSG\",\"4149\"]]";
+    }
+}
diff --git a/MapProjections/Shared/WorldMercatorProjection.cs b/MapProjections/Shared/WorldMercatorProjection.cs
index 2c0bf89c..c5c292b4 100644
--- a/MapProjections/Shared/WorldMercatorProjection.cs
+++ b/MapProjections/Shared/WorldMercatorProjection.cs
@@ -16,16 +16,16 @@ namespace MapControl.Projections
         {
             CoordinateSystemWkt
                 = "PROJCS[\"WGS 84 / World Mercator\","
-                + ProjNetMapProjectionFactory.GeoGcsWgs84 + ","
+                + WktConstants.GeoGcsWgs84 + ","
                 + "PROJECTION[\"Mercator_1SP\"],"
                 + "PARAMETER[\"latitude_of_origin\",0],"
                 + "PARAMETER[\"central_meridian\",0],"
                 + "PARAMETER[\"scale_factor\",1],"
                 + "PARAMETER[\"false_easting\",0],"
                 + "PARAMETER[\"false_northing\",0],"
-                + ProjNetMapProjectionFactory.UnitMeter + ","
-                + ProjNetMapProjectionFactory.AxisEasting + ","
-                + ProjNetMapProjectionFactory.AxisNorthing + ","
+                + "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+                + "AXIS[\"Easting\",EAST],"
+                + "AXIS[\"Northing\",NORTH],"
                 + "AUTHORITY[\"EPSG\",\"3395\"]]";
         }