static WknGeometryCollection 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)WknGeometryType.WknGeometryCollection)
{
throw new Exception("Invalid object type");
}
var nbShapes = BitConverter.ToUInt32(wkb, pos + 5);
pos += 9;
var shapes = new WknShape[nbShapes];
for (var r = 0; r < nbShapes; ++r)
{
shapes[r] = ParseShape(wkb, ref pos);
}
return(new WknGeometryCollection(shapes));
}
static public byte[] ConvertToBinary(WknShape shape)
{
using (var mem = new MemoryStream())
{
using (var wrt = new BinaryWriter(mem))
{
AppendShape(wrt, shape);
}
return(mem.ToArray());
}
}
static public void AppendShape(BinaryWriter wrt, WknShape shape)
{
switch (shape.Type)
{
case WknGeometryType.WknPoint:
AppendPoint(wrt, (WknPoint)shape);
break;
case WknGeometryType.WknLineString:
AppendLineString(wrt, (WknLineString)shape);
break;
case WknGeometryType.WknPolygon:
AppendPolygon(wrt, (WknPolygon)shape);
break;
case WknGeometryType.WknMultiPoint:
AppendMultiPoint(wrt, (WknMultiPoint)shape);
break;
case WknGeometryType.WknMultiLineString:
AppendMultiLineString(wrt, (WknMultiLineString)shape);
break;
case WknGeometryType.WknMultiPolygon:
AppendMultiPolygon(wrt, (WknMultiPolygon)shape);
break;
case WknGeometryType.WknGeometryCollection:
AppendGeometryCollection(wrt, (WknGeometryCollection)shape);
break;
default:
throw new NotImplementedException();
}
}
static public string ConvertToText(WknShape shape)
{
return(shape.ToString());
}
