Developer
May 12, 2011 at 10:38 PM

Anybody know the best way of computing a 2D Geometry from a 3D Geometry? I get a feature from a 3D featureset by doing a spatial query with a 2D geometry. Then, I want to do some further intersection calculations using the Topology code.
But, it does not like me having a mixture of true 3D IGeometries and some IGeometries with 0 for z. I'm going to try this, but it seems really a dumb way to do it:
foreach (IFeature feature in ifsSelected.Features)
{
IGeometry fg = Geometry.FromBasicGeometry(feature.BasicGeometry);
foreach (Coordinate c in fg.Coordinates)
c.Z = double.NaN;
searchGeometry.Intersects(fg))
}
What I'd really like is a way to create a new 2D geometry from the original 3D geometry, and I bet there's a method for that somewhere in the bowels of DotSpatial
Thanks,
Kyle

