/// <summary>
/// Gets all features inside the given bounding box and writes them as a geojson string.
/// </summary>
public static void WriteGeoJson(this RouterDb db, TextWriter writer, float minLatitude, float minLongitude,
float maxLatitude, float maxLongitude, bool includeEdges = true, bool includeVertices = true)
{
if (db == null)
{
throw new ArgumentNullException("db");
}
if (writer == null)
{
throw new ArgumentNullException("writer");
}
var jsonWriter = new JsonWriter(writer);
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "FeatureCollection", true, false);
jsonWriter.WritePropertyName("features", false);
jsonWriter.WriteArrayOpen();
var vertices = HilbertExtensions.Search(db.Network.GeometricGraph, minLatitude, minLongitude,
maxLatitude, maxLongitude);
var edges = new HashSet <long>();
var edgeEnumerator = db.Network.GetEdgeEnumerator();
foreach (var vertex in vertices)
{
if (includeVertices)
{
db.WriteVertex(jsonWriter, vertex);
}
if (includeEdges)
{
edgeEnumerator.MoveTo(vertex);
edgeEnumerator.Reset();
while (edgeEnumerator.MoveNext())
{
if (edges.Contains(edgeEnumerator.Id))
{
continue;
}
edges.Add(edgeEnumerator.Id);
db.WriteEdge(jsonWriter, edgeEnumerator);
}
}
}
jsonWriter.WriteArrayClose();
jsonWriter.WriteClose();
}
/// <summary>
/// Writes geojson describing the given routerpoint.
/// </summary>
internal static void WriteGeoJson(this RouterPoint routerPoint, TextWriter writer, RouterDb db)
{
if (db == null)
{
throw new ArgumentNullException("db");
}
if (writer == null)
{
throw new ArgumentNullException("writer");
}
var jsonWriter = new JsonWriter(writer);
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "FeatureCollection", true, false);
jsonWriter.WritePropertyName("features", false);
jsonWriter.WriteArrayOpen();
var edgeEnumerator = db.Network.GetEdgeEnumerator();
edgeEnumerator.MoveToEdge(routerPoint.EdgeId);
db.WriteEdge(jsonWriter, edgeEnumerator);
db.WriteVertex(jsonWriter, edgeEnumerator.From);
db.WriteVertex(jsonWriter, edgeEnumerator.To);
// write location on network.
var coordinate = routerPoint.LocationOnNetwork(db);
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "Feature", true, false);
jsonWriter.WritePropertyName("geometry", false);
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "Point", true, false);
jsonWriter.WritePropertyName("coordinates", false);
jsonWriter.WriteArrayOpen();
jsonWriter.WriteArrayValue(coordinate.Longitude.ToInvariantString());
jsonWriter.WriteArrayValue(coordinate.Latitude.ToInvariantString());
jsonWriter.WriteArrayClose();
jsonWriter.WriteClose();
jsonWriter.WritePropertyName("properties");
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "location_on_network", true);
jsonWriter.WriteProperty("offset", routerPoint.Offset.ToInvariantString());
jsonWriter.WriteClose();
jsonWriter.WriteClose();
// write original location.
coordinate = routerPoint.Location();
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "Feature", true, false);
jsonWriter.WritePropertyName("geometry", false);
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "Point", true, false);
jsonWriter.WritePropertyName("coordinates", false);
jsonWriter.WriteArrayOpen();
jsonWriter.WriteArrayValue(coordinate.Longitude.ToInvariantString());
jsonWriter.WriteArrayValue(coordinate.Latitude.ToInvariantString());
jsonWriter.WriteArrayClose();
jsonWriter.WriteClose();
jsonWriter.WritePropertyName("properties");
jsonWriter.WriteOpen();
jsonWriter.WriteProperty("type", "original_location", true);
jsonWriter.WriteClose();
jsonWriter.WriteClose();
jsonWriter.WriteArrayClose();
jsonWriter.WriteClose();
}