public IActionResult GetMvt(int z, uint x, uint y)
{
if (z != 14)
{
return(NotFound());
}
var tile = TileStatic.ToLocalId(x, y, z);
try
{
var box = TileStatic.Box(z, tile);
var landusePolygons = LandusePolygons.GetLandusePolygons(box, z, Startup.TileSource.GetTile, t =>
{
if (DefaultMergeFactorCalculator.Landuses.TryCalculateValue(t, out var type))
{
return(type);
}
return(null);
}).Select(p => new Feature(p.polygon, new AttributesTable {
{ "type", p.landuseType }
}));
var layer = new Layer {
Name = "landuse"
};
foreach (var loc in landusePolygons)
{
layer.Features.Add(loc);
}
var vectorTile = new VectorTile
{
TileId = new NetTopologySuite.IO.VectorTiles.Tiles.Tile((int)x, (int)y, z).Id
};
vectorTile.Layers.Add(layer);
var memoryStream = new MemoryStream();
vectorTile.Write(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
return(new FileStreamResult(memoryStream, "application/x-protobuf"));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
public async Task <IActionResult> GetMvt(int z, uint x, uint y)
{
if (z < 13)
{
return(NotFound());
}
try
{
var polygons = TiledPolygonGraphBuilder.GetPolygonsForTile((x, y, z), Startup.CachePath, Startup.TileSource.GetTile,
IsBarrier);
var layer = new Layer {
Name = "urban-polygons"
};
await foreach (var loc in polygons)
{
var max = double.MinValue;
var maxType = string.Empty;
var names = loc.Attributes.GetNames();
var values = loc.Attributes.GetValues();
var attributes = new AttributesTable();
for (var a = 0; a < names.Length; a++)
{
attributes.Add(names[a], values[a]);
var name = names[a];
if (name.StartsWith("face"))
{
continue;
}
var o = values[a];
var d = o is IConvertible convertible?convertible.ToDouble(null) : 0d;
if (d > max)
{
max = d;
maxType = name;
}
}
if (!string.IsNullOrWhiteSpace(maxType))
{
attributes.Add("type", maxType);
}
layer.Features.Add(new Feature(loc.Geometry, attributes));
}
var vectorTile = new VectorTile
{
TileId = new NetTopologySuite.IO.VectorTiles.Tiles.Tile((int)x, (int)y, z).Id
};
vectorTile.Layers.Add(layer);
var memoryStream = new MemoryStream();
vectorTile.Write(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
return(new FileStreamResult(memoryStream, "application/x-protobuf"));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
protected void AssertRoundTrip(Geometry inputGeometry, Geometry expectedGeometry,
string?name = null, IAttributesTable?properties = null, uint?id = null,
double expectedNumFeatures = 1, IAttributesTable?expectedProperties = null)
{
if (inputGeometry == null)
{
inputGeometry = FeatureGeometry;
}
if (expectedGeometry == null)
{
expectedGeometry = inputGeometry;
}
if (string.IsNullOrWhiteSpace(name))
{
name = LayerName;
}
if (properties == null)
{
properties = FeatureProperties;
}
if (expectedProperties == null)
{
expectedProperties = properties;
}
var featureS = new Feature(inputGeometry, properties);
if (id.HasValue)
{
featureS.Attributes[UID] = id;
}
var vtS = new VectorTile {
TileId = 0
};
var lyrS = new Layer {
Name = name
};
lyrS.Features.Add(featureS);
vtS.Layers.Add(lyrS);
VectorTile?vtD = null;
using (var ms = new MemoryStream())
{
vtS.Write(ms, Extent);
ms.Position = 0;
vtD = new MapboxTileReader(Factory).Read(ms, new VectorTiles.Tiles.Tile(0));
}
Assert.NotNull(vtD);
Assert.False(vtD.IsEmpty);
Assert.Equal(1, vtD.Layers.Count);
Assert.Equal(expectedNumFeatures, vtD.Layers[0].Features.Count);
var featureD = vtD.Layers[0].Features[0];
// Perform geometry checks
CheckGeometry(expectedGeometry, featureD.Geometry);
// Perform attribute checks
CheckAttributes(expectedProperties, featureD.Attributes);
}
private void FeatureIdReadWriteTest(Features.Feature featureS, ulong expectedId, string?idAttributeName = null)
{
var vtS = new VectorTile {
TileId = 0
};
var lyrS = new Layer {
Name = "test"
};
lyrS.Features.Add(featureS);
vtS.Layers.Add(lyrS);
using (var ms = new MemoryStream())
{
if (string.IsNullOrEmpty(idAttributeName))
{
//No ID property specified when writing.
vtS.Write(ms);
}
else
{
vtS.Write(ms, 4096, idAttributeName);
}
ms.Position = 0;
//Get the raw Mapbox Tile Feature Id value and compare to expected.
var tile = ProtoBuf.Serializer.Deserialize <NetTopologySuite.IO.VectorTiles.Mapbox.Tile>(ms);
var id = tile.Layers[0].Features[0].Id;
//Verify the id values match.
Assert.Equal(expectedId, id);
//Now test the Mapbox reader.
if (string.IsNullOrEmpty(idAttributeName))
{
idAttributeName = "id";
}
//Clear the keys and the feature's tags from the vector tiles. This will remove attribute values from the Mapbox feature.
//This ensures we are testing the Mapbox Features ID value, and not features attributes.
tile.Layers[0].Keys.Clear();
tile.Layers[0].Features[0].Tags.Clear();
using (var ms2 = new MemoryStream())
{
//Serialize the modified tile.
ProtoBuf.Serializer.Serialize <NetTopologySuite.IO.VectorTiles.Mapbox.Tile>(ms2, tile);
ms2.Position = 0;
//Read the tile. Specify the ID attribute name we want the ID value to be stored.
//By default the reader won't capture the ID value unless specified what attribute to store it in.
//The reason for this is that all Mapbox features have a default ID of 0, and it may be undesirable to capture this. This also ensures backwords compatibility.
var vtD = new MapboxTileReader().Read(ms2, new VectorTiles.Tiles.Tile(0), idAttributeName);
//Get the first feature. The ID value should be captured in it's attributes.
var f = vtD.Layers[0].Features[0];
//Compare with the expected ID.
Assert.Equal(expectedId, f.Attributes[idAttributeName]);
}
}
}