public Polygon(ShpReader reader)
: base(reader)
{
_shapeType = reader.ReadInt();
Debug.Assert(_shapeType == 5);
_box = new BoundingBox(reader);
_numParts = reader.ReadInt();
_numPoints = reader.ReadInt();
_parts = reader.ReadInts(_numParts);
_points = reader.ReadPoints(_numPoints);
}
