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41 lines
2.2 KiB
Markdown
41 lines
2.2 KiB
Markdown
# MapsforgeTiles
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Tile source libraries for loading map content from vector map files.
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The `MapsforgeTileSource` classes in these libraries make use of a `TileRenderer` class in a separate platform-independent
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.NET class library called MapsforgeWrapper. `TileRenderer` uses the [Mapsforge](https://github.com/mapsforge/mapsforge)
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Java library, which is made accessible to .NET via [IKVM](https://github.com/ikvmnet/ikvm), a Java Virtual Machine for .NET.
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[Mapsforge](https://github.com/mapsforge/mapsforge) is published under a simplified variant of the
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[LGPL v3 license](https://www.gnu.org/licenses/lgpl-3.0). Copies of the LGPL and GPL are included here.
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Map files can be downloaded from the [Mapsforge Download Server](https://download.mapsforge.org/).
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`MapsforgeTileSource` is initialized by a static `Initialize` method that takes the file path to either a single map file
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or a directory containing multiple map files, and a DPI scale factor that controls the size of the rendered map tiles.
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The `MapsforgeTileSource` instance constructor takes a string parameter that specifies the Mapsforge theme used by its `TileRenderer`.
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See [MapsforgeThemes.java](https://github.com/mapsforge/mapsforge/blob/master/mapsforge-themes/src/main/java/org/mapsforge/map/rendertheme/internal/MapsforgeThemes.java)
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for available theme names. A second, optional constructor parameter specifies the size of the TileRenderer's internal tile cache.
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Code sample:
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```
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MapControl.MapsforgeTiles.MapsforgeTileSource.Initialize(".\mapfiles", 1.5f);
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map.MapLayer = new MapTileLayer
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{
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TileSource = new MapControl.MapsforgeTiles.MapsforgeTileSource("Default")
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};
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```
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---
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While building MapsforgeWrapper with IKVM's `MavenReference` succeeds, resolving render theme assets
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in `mapsforge-themes/src/main/resources/assets` fails at runtime. An alternative approach is to import
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Mapsforge by an `IkvmReference` that references a local JAR file with all required dependencies.
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This means that [Maven](https://maven.apache.org/) is needed to build the MapsforgeWrapper library.
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There is a custom `PreBuild` event in `MapsforgeWrapper.csproj` which executes the command
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```
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mvn package
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```
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in the project file's directory. |