Added Etrs89UtmProjection

MapProjections/Shared/Etrs89UtmProjection.cs

@@ -0,0 +1,51 @@
+// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
+// © 2022 Clemens Fischer
+// Licensed under the Microsoft Public License (Ms-PL)
+
+using System;
+
+namespace MapControl.Projections
+{
+    public class Etrs89UtmProjection : GeoApiProjection
+    {
+        public Etrs89UtmProjection(int zone)
+        {
+            SetZone(zone);
+        }
+
+        protected void SetZone(int zone)
+        {
+            if (zone < 28 || zone > 38)
+            {
+                throw new ArgumentException($"Invalid UTM zone {zone}.", nameof(zone));
+            }
+
+            const string wktFormat
+                = "PROJCS[\"ETRS89 / UTM zone {0}N\","
+                + "GEOGCS[\"ETRS89\","
+                + "DATUM[\"European_Terrestrial_Reference_System_1989\","
+                + "SPHEROID[\"GRS 1980\",6378137,298.257222101,"
+                + "AUTHORITY[\"EPSG\",\"7019\"]],"
+                + "TOWGS84[0,0,0,0,0,0,0],"
+                + "AUTHORITY[\"EPSG\",\"6258\"]],"
+                + "PRIMEM[\"Greenwich\",0,"
+                + "AUTHORITY[\"EPSG\",\"8901\"]],"
+                + "UNIT[\"degree\",0.0174532925199433,"
+                + "AUTHORITY[\"EPSG\",\"9122\"]],"
+                + "AUTHORITY[\"EPSG\",\"4258\"]],"
+                + "PROJECTION[\"Transverse_Mercator\"],"
+                + "PARAMETER[\"latitude_of_origin\",0],"
+                + "PARAMETER[\"central_meridian\",{1}],"
+                + "PARAMETER[\"scale_factor\",0.9996],"
+                + "PARAMETER[\"false_easting\",500000],"
+                + "PARAMETER[\"false_northing\",0],"
+                + "UNIT[\"metre\",1,"
+                + "AUTHORITY[\"EPSG\",\"9001\"]],"
+                + "AXIS[\"Easting\",EAST],"
+                + "AXIS[\"Northing\",NORTH],"
+                + "AUTHORITY[\"EPSG\",\"258{0}\"]]";
+
+            WKT = string.Format(wktFormat, zone, 6 * zone - 183);
+        }
+    }
+}

MapProjections/Shared/GeoApiProjectionFactory.cs

@@ -8,8 +8,8 @@ namespace MapControl.Projections
     {
         public const int WorldMercator = 3395;
         public const int WebMercator = 3857;
-        public const int Etrs89UtmNorthFirst = 25828;
-        public const int Etrs89UtmNorthLast = 25838;
+        public const int Etrs89UtmFirst = 25828;
+        public const int Etrs89UtmLast = 25838;
         public const int Wgs84UtmNorthFirst = 32601;
         public const int Wgs84UtmNorthLast = 32660;
         public const int Wgs84UpsNorth = 32661;
@@ -33,16 +33,16 @@ namespace MapControl.Projections
                         projection = new WebMercatorProjection();
                         break;
 
-                    case int c when c >= Etrs89UtmNorthFirst && c <= Etrs89UtmNorthLast:
-                        projection = new GeoApiProjection(GetEtrs89UtmWkt(epsgCode));
+                    case int c when c >= Etrs89UtmFirst && c <= Etrs89UtmLast:
+                        projection = new Etrs89UtmProjection(epsgCode % 100);
                         break;
 
                     case int c when c >= Wgs84UtmNorthFirst && c <= Wgs84UtmNorthLast:
-                        projection = new UtmProjection(epsgCode - Wgs84UtmNorthFirst + 1, true);
+                        projection = new Wgs84UtmProjection(epsgCode % 100, true);
                         break;
 
                     case int c when c >= Wgs84UtmSouthFirst && c <= Wgs84UtmSouthLast:
-                        projection = new UtmProjection(epsgCode - Wgs84UtmSouthFirst + 1, false);
+                        projection = new Wgs84UtmProjection(epsgCode % 100, false);
                         break;
 
                     case Wgs84UpsNorth:
@@ -60,38 +60,5 @@ namespace MapControl.Projections
 
             return projection ?? base.GetProjection(crsId);
         }
-
-        private static string GetEtrs89UtmWkt(int epsgCode)
-        {
-            const string wktFormat
-                = "PROJCS[\"ETRS89 / UTM zone {1}N\","
-                + "GEOGCS[\"ETRS89\","
-                + "DATUM[\"European_Terrestrial_Reference_System_1989\","
-                + "SPHEROID[\"GRS 1980\",6378137,298.257222101,"
-                + "AUTHORITY[\"EPSG\",\"7019\"]],"
-                + "TOWGS84[0,0,0,0,0,0,0],"
-                + "AUTHORITY[\"EPSG\",\"6258\"]],"
-                + "PRIMEM[\"Greenwich\",0,"
-                + "AUTHORITY[\"EPSG\",\"8901\"]],"
-                + "UNIT[\"degree\",0.0174532925199433,"
-                + "AUTHORITY[\"EPSG\",\"9122\"]],"
-                + "AUTHORITY[\"EPSG\",\"4258\"]],"
-                + "PROJECTION[\"Transverse_Mercator\"],"
-                + "PARAMETER[\"latitude_of_origin\",0],"
-                + "PARAMETER[\"central_meridian\",{2}],"
-                + "PARAMETER[\"scale_factor\",0.9996],"
-                + "PARAMETER[\"false_easting\",500000],"
-                + "PARAMETER[\"false_northing\",0],"
-                + "UNIT[\"metre\",1,"
-                + "AUTHORITY[\"EPSG\",\"9001\"]],"
-                + "AXIS[\"Easting\",EAST],"
-                + "AXIS[\"Northing\",NORTH],"
-                + "AUTHORITY[\"EPSG\",\"{0}\"]]";
-
-            var zone = epsgCode % 100;
-            var centralMeridian = 6 * (epsgCode - Etrs89UtmNorthFirst) - 15;
-
-            return string.Format(wktFormat, epsgCode, zone, centralMeridian);
-        }
     }
 }

MapProjections/Shared/Wgs84UtmProjection.cs

@@ -7,25 +7,18 @@ using System;
 
 namespace MapControl.Projections
 {
-    public class UtmProjection : GeoApiProjection
+    public class Wgs84UtmProjection : GeoApiProjection
     {
-        public UtmProjection(int zone, bool north)
+        public Wgs84UtmProjection(int zone, bool north)
         {
             SetZone(zone, north);
         }
 
-        public UtmProjection(Location location)
-        {
-            var zone = Math.Min((int)Math.Floor(Location.NormalizeLongitude(location.Longitude) + 180d) / 6 + 1, 60);
-
-            SetZone(zone, location.Latitude >= 0d);
-        }
-
         protected void SetZone(int zone, bool north)
         {
             if (zone < 1 || zone > 60)
             {
-                throw new ArgumentException("Invalid UTM zone number.", nameof(zone));
+                throw new ArgumentException($"Invalid UTM zone {zone}.", nameof(zone));
             }
 
             CoordinateSystem = ProjectedCoordinateSystem.WGS84_UTM(zone, north);

MapProjections/UWP/MapProjections.UWP.csproj

@@ -40,6 +40,9 @@
     <RestoreProjectStyle>PackageReference</RestoreProjectStyle>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="..\Shared\Etrs89UtmProjection.cs">
+      <Link>Etrs89UtmProjection.cs</Link>
+    </Compile>
     <Compile Include="..\Shared\GeoApiProjection.cs">
       <Link>GeoApiProjection.cs</Link>
     </Compile>
@@ -49,12 +52,12 @@
     <Compile Include="..\Shared\PolarStereographicProjection.cs">
       <Link>PolarStereographicProjection.cs</Link>
     </Compile>
-    <Compile Include="..\Shared\UtmProjection.cs">
-      <Link>UtmProjection.cs</Link>
-    </Compile>
     <Compile Include="..\Shared\WebMercatorProjection.cs">
       <Link>WebMercatorProjection.cs</Link>
     </Compile>
+    <Compile Include="..\Shared\Wgs84UtmProjection.cs">
+      <Link>Wgs84UtmProjection.cs</Link>
+    </Compile>
     <Compile Include="Properties\AssemblyInfo.cs" />
     <EmbeddedResource Include="Properties\MapProjections.UWP.rd.xml" />
   </ItemGroup>