From 93d5e066a235c54ae1078285793ba5039fd59e57 Mon Sep 17 00:00:00 2001
From: jokubokla <33501078+jokubokla@users.noreply.github.com>
Date: Fri, 13 Mar 2020 18:32:55 +0100
Subject: [PATCH] =?UTF-8?q?Lantm=C3=A4teriet=20Map:=20Pseudo=20Mercator=20?=
=?UTF-8?q?(EPSG:3857)=20instead=20of=20SWEREF99=20(EPSG:3006)?=
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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.
---
Demo.WindowsForms/Forms/MainForm.cs | 13 +-
GMap.NET.Core/GMap.NET.Core.csproj | 1 +
.../Etc/SwedenMapProviderAlt.cs | 135 ++++++++++++++++++
.../GMap.NET.MapProviders/GMapProvider.cs | 5 +-
4 files changed, 152 insertions(+), 2 deletions(-)
create mode 100644 GMap.NET.Core/GMap.NET.MapProviders/Etc/SwedenMapProviderAlt.cs
diff --git a/Demo.WindowsForms/Forms/MainForm.cs b/Demo.WindowsForms/Forms/MainForm.cs
index 1c6dcaa9..f8902b96 100644
--- a/Demo.WindowsForms/Forms/MainForm.cs
+++ b/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;
diff --git a/GMap.NET.Core/GMap.NET.Core.csproj b/GMap.NET.Core/GMap.NET.Core.csproj
index 7a5f8f57..1751b0b0 100644
--- a/GMap.NET.Core/GMap.NET.Core.csproj
+++ b/GMap.NET.Core/GMap.NET.Core.csproj
@@ -235,6 +235,7 @@
+
diff --git a/GMap.NET.Core/GMap.NET.MapProviders/Etc/SwedenMapProviderAlt.cs b/GMap.NET.Core/GMap.NET.MapProviders/Etc/SwedenMapProviderAlt.cs
new file mode 100644
index 00000000..815285e0
--- /dev/null
+++ b/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";
+ }
+
+ ///
+ /// SwedenMapAlt provider
+ ///
+ 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";
+
+
+ }
+}
\ No newline at end of file
diff --git a/GMap.NET.Core/GMap.NET.MapProviders/GMapProvider.cs b/GMap.NET.Core/GMap.NET.MapProviders/GMapProvider.cs
index f79ac728..cd2385a0 100644
--- a/GMap.NET.Core/GMap.NET.MapProviders/GMapProvider.cs
+++ b/GMap.NET.Core/GMap.NET.MapProviders/GMapProvider.cs
@@ -157,7 +157,10 @@ static GMapProviders()
public static readonly SwedenMapProvider SwedenMap = SwedenMapProvider.Instance;
- static List list;
+ // 20200313 (jokubokla): The Alternative Mercator (EPSG:3857) instead of SWEREF99 (EPSG:3006)
+ public static readonly SwedenMapProviderAlt SwedenMapAlternative = SwedenMapProviderAlt.Instance;
+
+ static List list;
///
/// get all instances of the supported providers