Lantmäteriet Map: Pseudo Mercator (EPSG:3857) instead of SWEREF99 (EP…

Demo.WindowsForms/Forms/MainForm.cs

@@ -75,7 +75,18 @@ public MainForm()
             MainMap.Position = new PointLatLng(54.6961334816182, 25.2985095977783);
             MainMap.MinZoom = 0;
             MainMap.MaxZoom = 24;
-            MainMap.Zoom = 9;            
+            MainMap.Zoom = 9;
+
+            // 20200313 (jokubokla): Demo of the new Sweden Map with Mercator instead of SWEREF99
+            MainMap.MapProvider = GMapProviders.SwedenMapAlternative;
+            MainMap.Position = new PointLatLng(58.406298501604, 15.5825614929199); // Linköping
+            MainMap.MinZoom = 1;
+            MainMap.MaxZoom = 15;
+            MainMap.Zoom = 11;
+            textBoxLat.Text = MainMap.Position.Lat.ToString(CultureInfo.InvariantCulture);
+            textBoxLng.Text = MainMap.Position.Lng.ToString(CultureInfo.InvariantCulture);
+            textBoxGeo.Text = "Linköping";
+
 
             //MainMap.ScaleMode = ScaleModes.Fractional;
 

GMap.NET.Core/GMap.NET.Core.csproj

@@ -235,6 +235,7 @@
     <Compile Include="GMap.NET.MapProviders\Czech\CzechTuristMapProvider.cs" />
     <Compile Include="GMap.NET.MapProviders\Czech\CzechTuristWinterMapProvider.cs" />
     <Compile Include="GMap.NET.MapProviders\Etc\CloudMadeMapProvider.cs" />
+    <Compile Include="GMap.NET.MapProviders\Etc\SwedenMapProviderAlt.cs" />
     <Compile Include="GMap.NET.MapProviders\Etc\SwedenMapProvider.cs" />
     <Compile Include="GMap.NET.MapProviders\Etc\WikiMapiaMapProvider.cs" />
     <Compile Include="GMap.NET.MapProviders\CzechOld\CzechHistoryMapProvider.cs" />

GMap.NET.Core/GMap.NET.MapProviders/Etc/SwedenMapProviderAlt.cs

@@ -0,0 +1,135 @@
+///--------------------------------------------------------------------------------------------
+/// 20200313 (jokubokla): The Pseudo Mercator (EPSG:3857) instead of SWEREF99 (EPSG:3006)
+///
+/// This project contains the Lantmäteriet SWEREF99 Map for quite some time. Recently I found 
+/// out (by using QGIS and the GetCapabilities function of WMTS) that the Lantmäteriet map 
+/// is available also in a Pseudo Mercator Projection (EPSG:3857). 
+/// 
+/// This is very convenient if one uses this project to generate offline Maps, e.g. in 
+/// the .mbtiles SQLite database format. Android Apps like LOCUS or ORUX only understand
+/// Mercator to my knowledge. With this Provider, Android maps from Lantmäteriet can be 
+/// created for those Apps as well.
+///--------------------------------------------------------------------------------------------
+
+namespace GMap.NET.MapProviders
+{
+   using System;
+   using GMap.NET.Projections;
+
+   public abstract class SwedenMapProviderAltBase : GMapProvider
+   {
+      public SwedenMapProviderAltBase()
+      {
+         RefererUrl = "https://kso.etjanster.lantmateriet.se/?lang=en";
+         Copyright = string.Format("©{0} Lantmäteriet", DateTime.Today.Year);
+         MaxZoom = 15;
+      }
+
+      #region GMapProvider Members
+      public override Guid Id
+      {
+         get
+         {
+            throw new NotImplementedException();
+         }
+      }
+
+      public override string Name
+      {
+         get
+         {
+            throw new NotImplementedException();
+         }
+      }
+
+      public override PureProjection Projection
+      {
+         get
+         {
+            return MercatorProjection.Instance;
+         }
+      }
+
+      GMapProvider[] overlays;
+      public override GMapProvider[] Overlays
+      {
+         get
+         {
+            if (overlays == null)
+            {
+               overlays = new GMapProvider[] { this };
+            }
+            return overlays;
+         }
+      }
+
+      public override PureImage GetTileImage(GPoint pos, int zoom)
+      {
+         throw new NotImplementedException();
+      }
+      #endregion
+
+      protected static readonly string UrlServerLetters = "bcde";
+   }
+
+   /// <summary>
+   /// SwedenMapAlt provider
+   /// </summary>
+   public class SwedenMapProviderAlt : SwedenMapProviderAltBase
+   {
+      public static readonly SwedenMapProviderAlt Instance;
+
+      SwedenMapProviderAlt()
+      {
+      }
+
+      static SwedenMapProviderAlt()
+      {
+         Instance = new SwedenMapProviderAlt();
+      }
+
+      #region GMapProvider Members
+
+      readonly Guid id = new Guid("d5e8e0de-3a93-4983-941e-9b66d79f50d6");
+      public override Guid Id
+      {
+         get
+         {
+            return id;
+         }
+      }
+
+      readonly string name = "SwedenMapAlternative";
+      public override string Name
+      {
+         get
+         {
+            return name;
+         }
+      }
+
+      public override PureImage GetTileImage(GPoint pos, int zoom)
+      {
+         string url = MakeTileImageUrl(pos, zoom, LanguageStr);
+
+         return GetTileImageUsingHttp(url);
+      }
+
+      #endregion
+
+
+      // 20200313 (jokubokla): Here is the magic: Use another Projection for Lantmateriet
+
+
+      string MakeTileImageUrl(GPoint pos, int zoom, string language)
+      {
+         // https://kso.etjanster.lantmateriet.se/karta/topowebb/v1/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=topowebb&STYLE=default&TILEMATRIXSET=3857&TILEMATRIX=2&TILEROW=6&TILECOL=7&FORMAT=image%2Fpng
+
+         return string.Format(UrlFormat, zoom, pos.Y, pos.X);
+      }
+
+      static readonly string UrlFormat = "https://kso.etjanster.lantmateriet.se/karta/topowebb/v1.1/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=topowebb&STYLE=default&TILEMATRIXSET=3857&TILEMATRIX={0}&TILEROW={1}&TILECOL={2}&FORMAT=image%2Fpng";
+
+
+   }
+}

GMap.NET.Core/GMap.NET.MapProviders/GMapProvider.cs

@@ -157,7 +157,10 @@ static GMapProviders()
 
         public static readonly SwedenMapProvider SwedenMap = SwedenMapProvider.Instance;
 
-        static List<GMapProvider> list;
+      // 20200313 (jokubokla): The Alternative Mercator (EPSG:3857) instead of SWEREF99 (EPSG:3006)
+      public static readonly SwedenMapProviderAlt SwedenMapAlternative = SwedenMapProviderAlt.Instance;
+
+      static List<GMapProvider> list;
 
         /// <summary>
         /// get all instances of the supported providers