Ejemplo n.º 1
0
        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));
            }
        }