public static double[][] unpack_geometry(string geometry)
{
if (!String.IsNullOrEmpty(geometry))
{
var numberChars = geometry.Length;
var bytes = new byte[numberChars / 2];
for (var i = 0; i < numberChars; i += 2)
{
bytes[i / 2] = Convert.ToByte(geometry.Substring(i, 2), 16);
}
WkbShape shape = WkbDecoder.Parse(bytes);
if (shape.GetType() == typeof(WkbMultiLineString))
{
var lineString = (WkbMultiLineString)shape;
if (lineString.LineString.Count() > 0)
{
var index = 0;
var points = new double[lineString.LineString[0].Points.Count()][];
foreach (var point in lineString.LineString[0].Points)
{
points[index] = new[] { point.X, point.Y };
index++;
}
return(points);
}
}
}
return(new double[][] { });
}
static WkbGeometryCollection ParseGeometryCollection(byte[] wkb, ref int pos)
{
if (wkb[pos] != 1)
{
throw new Exception("Sorry, only Little Endian format is supported");
}
var type = BitConverter.ToUInt32(wkb, pos + 1);
if (type != (uint)WkbGeometryType.WkbGeometryCollection)
{
throw new Exception("Invalid object type");
}
var nbShapes = BitConverter.ToUInt32(wkb, pos + 5);
pos += 9;
var shapes = new WkbShape[nbShapes];
for (var r = 0; r < nbShapes; ++r)
{
shapes[r] = ParseShape(wkb, ref pos);
}
return(new WkbGeometryCollection(shapes));
}
