public static Feature ToGeoJSON(this VectorTileFeature vectortileFeature, int x, int y, int z)
{
IGeometryObject geom = null;
switch (vectortileFeature.GeometryType)
{
case Tile.GeomType.Point:
var projectedPoints = ProjectPoints(vectortileFeature.Geometry, x, y, z, vectortileFeature.Extent);
geom = GetPointGeometry(projectedPoints);
break;
case Tile.GeomType.LineString:
var projectedLines = ProjectLines(vectortileFeature.Geometry, x, y, z, vectortileFeature.Extent);
geom = GetLineGeometry(projectedLines);
break;
case Tile.GeomType.Polygon:
var rings = ClassifyRings.Classify(vectortileFeature.Geometry);
var projectedPolygons = ProjectPolygons(rings, x, y, z, vectortileFeature.Extent);
geom = GetPolygonGeometry(projectedPolygons);
break;
}
var result = new Feature(geom, id: vectortileFeature.Id);
// add attributes
foreach (var item in vectortileFeature.Attributes)
{
result.Properties.Add(item.Key, item.Value);
}
return(result);
}
public static VectorTileFeature Parse(Tile.Feature feature, List <string> keys, List <Tile.Value> values, uint extent)
{
var result = new VectorTileFeature();
var id = feature.Id;
var geom = GeometryParser.ParseGeometry(feature.Geometry, feature.Type);
result.GeometryType = feature.Type;
// add the geometry
result.Geometry = geom;
result.Extent = extent;
// now add the attributes
result.Id = id.ToString(CultureInfo.InvariantCulture);
result.Attributes = AttributesParser.Parse(keys, values, feature.Tags);
return(result);
}
