Tuiles Web

Travailler avec les tuiles XYZ

La tuile XYZ (“Slippy Map”) est une approche pour créer des cartes sur le web. La carte du monde est divisée en parties appelées tuiles. Toutes les tuiles sont stockées dans les services de tuiles Web Mapping Service comme Openstreetmaps, Google Hybrid, Bing, OpenCycleMap, Thunderforest, etc. Et la bibliothèque Aspose.GIS C# vous permet de travailler avec les tuiles XYZ.

Afficher une tuile xyz

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
var mapPath = Path.Combine(RunExamples.GetDataDir(), "out_osm_tile.png");

// we use the osm tile server
string url = "http://tile.openstreetmap.org/{z}/{x}/{y}.png";
using (var layer = Drivers.XyzTiles.OpenLayer(new XyzConnection(url)))
{
    // print tile info
    var tile = layer.GetTile(2, 3, 1);
    Console.WriteLine($"CellX: {tile.CellX}, CellY: {tile.CellY}" );
    Console.WriteLine($"Path: {tile.AsPath()}");

    // render tile
    var resampling = new RasterMapResampling() { Height = 256, Width = 256 };
    using (var map = new Map(800, 800))
    {
        var raster = tile.AsRaster();
        map.Add(new RasterMapLayer(raster){Resampling = resampling});
        map.Render(mapPath, Renderers.Png);
    }
    Console.WriteLine($"Rendered Map: {mapPath}");
}

Afficher les tuiles xyz par étendue

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
var mapPath = Path.Combine(RunExamples.GetDataDir(), "out_osm_tiles.png");

// we use the osm tile server
string url = "http://tile.openstreetmap.org/{z}/{x}/{y}.png";
using (var layer = Drivers.XyzTiles.OpenLayer(new XyzConnection(url)))
{
    // print tiles info
    var extent = new Extent(-90, -40, 90, 40) {SpatialReferenceSystem = SpatialReferenceSystem.Wgs84};
    var tiles = layer.GetTiles(2, extent).ToList();

    // render tiles
    var resampling = new RasterMapResampling() { Height = 800, Width = 800 };
    using (var map = new Map(800, 800))
    {
        foreach (var tile in tiles)
        {
            var raster = tile.AsRaster();
            map.Add(new RasterMapLayer(raster) { Resampling = resampling });
        }
        map.Render(mapPath, Renderers.Png);
    }
    Console.WriteLine($"Rendered Map: {mapPath}");
}

Ouvrir une tuile xyz à partir d’un dossier

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
string url = "C://tiles/{z}/{x}/{y}.png";
using (var layer = Drivers.XyzTiles.OpenLayer(new XyzConnection(url)))
{
    // print tile info
    var tile = layer.GetTile(0, 0, 0);
    Console.WriteLine($"CellX: {tile.CellX}, CellY: {tile.CellY}");
    Console.WriteLine($"Path: {tile.AsPath()}");
}