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NuGet BruTile
NuGet BruTile.MbTiles

BruTile is a .NET Standard 2.0 library to access tile services like OpenStreetMap and Bing. Such tile services store pre-rendered tiles for a certain area and for various levels of detail. BruTile helps to determine which tiles to fetch for a certain viewport of a map. BruTile returns tiles as raw image streams and has no dependency on a specific client platform. BruTile does not display those tiles. You need to use a mapping library like SharpMap, ArcBruTile or Mapsui or write your own code to display tiles.

What BruTile does is:

1. Helps to construct a tile source, an object that has all information about a tile service.
2. Helps to calculate which tiles you need, given a certain map extent and a map resolution (units per pixel).
3. Helps you fetch those tiles.

BruTile V4 consists of 2 nugets that support .NET Standard 2.0.

• Support for .NET Framework 4.5 has been removed (also the samples and tests have moved to .NET Core).
• BruTile.Desktop and BruTile.Desktop.DbCache have been deleted and their content has moved to the BruTile nuget.

For a demo showing various data sources download the source code and run BruTile.Demo in the Samples folder

Create a .NET Console app in Visual Studio. The the BruTile NuGet package. Use the package manager tools in Visual Studio or add it from the package manager console:

PM> install-package BruTile 

// This is an example that creates the OpenStreetMap tile source:
var tileSource = new HttpTileSource(new GlobalSphericalMercator(0, 18),
    "http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
    new[] {"a", "b", "c"}, "OSM");

// the extent of the visible map changes but lets start with the whole world
var extent = new Extent(-20037508, -20037508, 20037508, 20037508);
var screenWidthInPixels = 400; // The width of the map on screen in pixels
var resolution = extent.Width / screenWidthInPixels;
var tileInfos = tileSource.Schema.GetTileInfos(extent, resolution);

Console.WriteLine("Show tile info");
foreach (var tileInfo in tileInfos)
{
    var tile = await tileSource.GetTileAsync(tileInfo);

    Console.WriteLine(
        $"tile col: {tileInfo.Index.Col}, " +
        $"tile row: {tileInfo.Index.Row}, " +
        $"tile level: {tileInfo.Index.Level} , " +
        $"tile size {tile.Length}");
}

Output:

    tile col: 0, tile row: 0, tile level: 1 , tile size 11276
    tile col: 0, tile row: 1, tile level: 1 , tile size 3260
    tile col: 1, tile row: 0, tile level: 1 , tile size 10679
    tile col: 1, tile row: 1, tile level: 1 , tile size 4009

// You can easily create an ITileSource for a number of predefined tile servers
// with single line statements like:
var tileSource1 = KnownTileSources.Create(); // The default is OpenStreetMap
var tileSource2 = KnownTileSources.Create(KnownTileSource.BingAerial);
var tileSource3 = KnownTileSources.Create(KnownTileSource.BingHybrid);
var tileSource4 = KnownTileSources.Create(KnownTileSource.StamenTonerLite);
var tileSource5 = KnownTileSources.Create(KnownTileSource.EsriWorldShadedRelief);

The predefined tile sources are defined in a single file. Take a look at that file here to learn how you could create any tile source.

var mbtilesTilesource = new MbTilesTileSource(new SQLiteConnectionString("Resources/world.mbtiles", false));
var mbTilesTile = await mbtilesTilesource.GetTileAsync(new TileInfo { Index = new TileIndex(0, 0, 0) });
Console.WriteLine($"This is a byte array of an image file loaded from MBTiles with size: {mbTilesTile.Length}");

Output:

This is a byte array of an image file loaded from MBTiles with size: 27412

The above code can also be found in the BruTile sample called BruTile.GettingStarted in the Samples folder of this repository.

• WMTS
• TMS
• OSM (Like TMS with inverted y-axis)
• WMS (tiled requests to a regular WMS)
• ArcGIS Tile Server
• WMS-C

• Stability is currently our primary focus.

• ArcBruTile a plugin for ArcGIS
• SharpMap a GIS library
• Mapsui a MapComponent for Xamarin.Android. Xamarin.iOS, UWP and WPF
• DotSpatial a GIS library that is used in HydroDesktop

Apache 2.0