private static EndianAwareBinaryWriter WritePosition(EndianAwareBinaryWriter writer, Position position)
{
writer.Write(position.Longitude);
writer.Write(position.Latitude);
return(writer);
}
private static void ToBinary(EndianAwareBinaryWriter writer, MultiPolygon multiPolygon)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.MultiPolygon);
writer.Write((UInt32)multiPolygon.Coordinates.Count());
foreach (Polygon polygon in multiPolygon.Coordinates)
{
ToBinary(writer, polygon);
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, GeometryCollection geometryCollection)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.GeometryCollection);
writer.Write((UInt32)geometryCollection.Geometries.Count());
foreach (Geometry geometry in geometryCollection.Geometries)
{
ToBinary(writer, geometry);
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, MultiLineString multiLineString)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.MultiLineString);
writer.Write((UInt32)multiLineString.Coordinates.Count());
foreach (LineString lineString in multiLineString.Coordinates)
{
ToBinary(writer, lineString);
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, LineString lineString)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.LineString);
writer.Write(lineString.Coordinates.Count());
foreach (Position pos in lineString.Coordinates)
{
WritePosition(writer, pos);
}
}
/// <summary>
/// Converts a geometry object to WKB based on what it's real underlying
/// type is, like Point or LineString.
/// </summary>
/// <param name="geo">The geometry to serialize</param>
/// <param name="endianness">The endianness to use during serialization, defaults to LITTLE endian.</param>
/// <returns></returns>
public static byte[] ToBinary(Geometry geo, Endianness endianness = Endianness.LITTLE)
{
using (MemoryStream stream = new MemoryStream())
{
using (EndianAwareBinaryWriter writer = new EndianAwareBinaryWriter(stream, endianness))
{
ToBinary(writer, geo);
return(stream.ToArray());
}
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, MultiPoint multiPoint)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.MultiPoint);
writer.Write((UInt32)multiPoint.Coordinates.Count());
foreach (Position pos in multiPoint.Coordinates)
{
Point point = new Point(pos);
ToBinary(writer, point);
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, Geometry geometry)
{
switch (geometry.Type)
{
case GeoJsonType.Point:
{
ToBinary(writer, (Point)geometry);
break;
}
case GeoJsonType.LineString:
{
ToBinary(writer, (LineString)geometry);
break;
}
case GeoJsonType.Polygon:
{
ToBinary(writer, (Polygon)geometry);
break;
}
case GeoJsonType.MultiPoint:
{
ToBinary(writer, (MultiPoint)geometry);
break;
}
case GeoJsonType.MultiLineString:
{
ToBinary(writer, (MultiLineString)geometry);
break;
}
case GeoJsonType.MultiPolygon:
{
ToBinary(writer, (MultiPolygon)geometry);
break;
}
case GeoJsonType.GeometryCollection:
{
ToBinary(writer, (GeometryCollection)geometry);
break;
}
default:
{
throw new NotSupportedException($"The GeoJson type {geometry.Type.ToString()} is not supported for conversion to WKB.");
}
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, Polygon polygon)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.Polygon);
writer.Write((UInt32)polygon.Coordinates.Count());
foreach (LinearRing linearRing in polygon.Coordinates)
{
writer.Write((UInt32)linearRing.Coordinates.Count());
foreach (Position pos in linearRing.Coordinates)
{
WritePosition(writer, pos);
}
}
}
private static void ToBinary(EndianAwareBinaryWriter writer, Point point)
{
writer.WriteEndianness();
writer.Write((UInt32)WkbType.Point);
WritePosition(writer, point.Coordinates);
}