public IActionResult GetTile(int z, int x, int y)
{
// x,y,z.
var tile = new Itinero.VectorTiles.Tiles.Tile(x, y, z);
var vectorTile = this.GetVectorTile(tile.Id);
var stream = new MemoryStream();
lock (Program.RouterDb)
{
vectorTile.Value.Write(stream, (a, l) =>
{
if (l.Name != "transportation")
{
return(a);
}
var result = new Attributes.AttributeCollection();
string highway;
if (a.TryGetValue("highway", out highway))
{
var className = string.Empty;
switch (highway)
{
case "motorway":
case "motorway_link":
className = "motorway";
break;
case "trunk":
case "trunk_link":
className = "trunk";
break;
case "primary":
case "primary_link":
className = "primary";
break;
case "secondary":
case "secondary_link":
className = "secondary";
break;
case "tertiary":
case "tertiary_link":
className = "tertiary";
break;
case "unclassified":
case "residential":
case "living_street":
case "road":
className = "minor";
break;
case "service":
case "track":
className = highway;
break;
case "pedestrian":
case "path":
case "footway":
case "cycleway":
case "steps":
case "bridleway":
case "corridor":
className = "path";
break;
}
if (!string.IsNullOrEmpty(className))
{
result.AddOrReplace("class", className);
}
}
foreach (var tag in a)
{
if (tag.Key == "highway")
{
continue;
}
result.AddOrReplace(tag.Key, tag.Value);
}
return(result);
});
}
stream.Seek(0, SeekOrigin.Begin);
return(new FileStreamResult(stream, new MediaTypeHeaderValue("application/x-protobuf")));
}
/// <summary>
/// Gets a vector tile.
/// </summary>
public Result <VectorTile> GetVectorTile(ulong tileId)
{
try
{
var tile = new Itinero.VectorTiles.Tiles.Tile(tileId);
var z = tile.Zoom;
var config = new VectorTileConfig()
{
EdgeLayerConfigs = new List <EdgeLayerConfig>()
{
new EdgeLayerConfig()
{
Name = "transportation",
GetAttributesFunc = (edgeId, zoom) =>
{
HashSet <ushort> profilesPerZoom = null;
if (z < Program.ProfilesPerZoom.Length)
{
profilesPerZoom = Program.ProfilesPerZoom[z];
}
var edge = Program.RouterDb.Network.GetEdge(edgeId);
if (profilesPerZoom != null &&
!profilesPerZoom.Contains(edge.Data.Profile))
{
// don't return edges of this type at this zoom.
return(null);
}
// filter and convert attributes.
var a = new AttributeCollection(Program.RouterDb.GetEdgeAttributes(edgeId));
var result = new Attributes.AttributeCollection();
if (a.TryGetValue("highway", out var highway))
{
var className = string.Empty;
switch (highway)
{
case "motorway":
case "motorway_link":
className = "motorway";
break;
case "trunk":
case "trunk_link":
className = "trunk";
break;
case "primary":
case "primary_link":
className = "primary";
break;
case "secondary":
case "secondary_link":
className = "secondary";
break;
case "tertiary":
case "tertiary_link":
className = "tertiary";
break;
case "unclassified":
case "residential":
case "living_street":
case "road":
className = "minor";
break;
case "service":
case "track":
className = highway;
break;
case "pedestrian":
case "path":
case "footway":
case "cycleway":
case "steps":
case "bridleway":
case "corridor":
className = "path";
break;
}
if (!string.IsNullOrEmpty(className))
{
result.AddOrReplace("class", className);
}
}
else
{ // no highway tag.
return(null);
}
foreach (var tag in a)
{
if (tag.Key == "highway")
{
continue;
}
result.AddOrReplace(tag.Key, tag.Value);
}
return(result);
}
}
}
};
return(new Result <VectorTile>(Program.RouterDb.ExtractTile(tileId, config)));
}
catch (System.Exception ex)
{
return(new Result <VectorTile>(ex.Message));
}
}
