private void WriteCoordinate(Coordinate coordinate, WkbBinaryWriter writer)
{
writer.Write(coordinate.Longitude);
writer.Write(coordinate.Latitude);
if (coordinate.Is3D && _settings.MaxDimesions > 2)
{
writer.Write(((Is3D)coordinate).Elevation);
}
if (coordinate.IsMeasured && _settings.MaxDimesions > 3)
{
writer.Write(((IsMeasured)coordinate).Measure);
}
}
private void WritePolygonInner(Polygon polygon, WkbBinaryWriter writer)
{
if (polygon.IsEmpty)
{
writer.Write(0u);
}
else
{
writer.Write((uint)(1 + polygon.Holes.Count));
WriteCoordinates(polygon.Shell.Coordinates, writer);
foreach (var hole in polygon.Holes)
{
WriteCoordinates(hole.Coordinates, writer);
}
}
}
private void WriteMultiPolygon(MultiPolygon multiPolygon, WkbBinaryWriter writer)
{
WriteGeometryType(multiPolygon, WkbGeometryType.MultiPolygon, writer);
writer.Write((uint)multiPolygon.Geometries.Count);
foreach (var polygon in multiPolygon.Geometries.Cast <Polygon>())
{
WritePolygonInner(polygon, writer);
}
}
private void WriteMultiLineString(MultiLineString multiLineString, WkbBinaryWriter writer)
{
WriteGeometryType(multiLineString, WkbGeometryType.MultiLineString, writer);
writer.Write((uint)multiLineString.Geometries.Count);
foreach (var linestring in multiLineString.Geometries.Cast <LineString>())
{
WriteCoordinates(linestring.Coordinates, writer);
}
}
private void WriteCoordinates(CoordinateSequence coordinates, WkbBinaryWriter writer)
{
writer.Write((uint)coordinates.Count);
foreach (var coordinate in coordinates)
{
WriteCoordinate(coordinate, writer);
}
}
private void WriteMultiPolygon(MultiPolygon multiPolygon, WkbBinaryWriter writer)
{
WriteEncoding(writer, _settings.Encoding);
WriteGeometryType(multiPolygon, WkbGeometryType.MultiPolygon, writer);
writer.Write((uint)multiPolygon.Geometries.Count);
foreach (var polygon in multiPolygon.Geometries.Cast <Polygon>())
{
Write(polygon, writer);
}
}
private void WriteMultiLineString(MultiLineString multiLineString, WkbBinaryWriter writer)
{
WriteEncoding(writer, _settings.Encoding);
WriteGeometryType(multiLineString, WkbGeometryType.MultiLineString, writer);
writer.Write((uint)multiLineString.Geometries.Count);
foreach (var linestring in multiLineString.Geometries.Cast <LineString>())
{
Write(linestring, writer);
}
}
private void WriteGeometryCollection(GeometryCollection collection, WkbBinaryWriter writer)
{
WriteGeometryType(collection, WkbGeometryType.GeometryCollection, writer);
var geometries = collection.Geometries.Where(x => !(x is Point) || !x.IsEmpty).ToList();
writer.Write((uint)geometries.Count);
foreach (var geometry in geometries)
{
Write(geometry, writer);
}
}
private void WriteMultiPoint(MultiPoint multipoint, WkbBinaryWriter writer)
{
WriteGeometryType(multipoint, WkbGeometryType.MultiPoint, writer);
var points = multipoint.Geometries.Cast <Point>().Where(x => !x.IsEmpty).ToList();
writer.Write((uint)points.Count);
foreach (var point in points)
{
WriteCoordinate(point.Coordinate, writer);
}
}
private void WriteGeometryType(IOgcGeometry geometry, WkbGeometryType baseType, WkbBinaryWriter writer)
{
if (geometry.IsEmpty)
{
writer.Write((uint)baseType);
}
else
{
var typeCode = (uint)baseType;
if (geometry.Is3D && _settings.MaxDimesions > 2)
{
typeCode += 1000;
}
if (geometry.IsMeasured && _settings.MaxDimesions > 3)
{
typeCode += 2000;
}
writer.Write(typeCode);
}
}
private void WriteEncoding(WkbBinaryWriter writer, WkbEncoding encoding)
{
writer.Write((byte)encoding);
}
