[OSGeo-Discuss] multipatch shapefile FIRST_RING structure

[Rushforth, Peter]

Frank,

> I would not expect to do the analysis in 3D as for my 
> purposes I am only interested in 2.5D geometry sets.  I 
> believe multipatch files are normally used to represent TINs 
> which can be safely analysed in 2D, and the Z values just 
> carried along.
> 

I guess I'm getting worked up over nothing then.  I can just use
the magic of JTS to sort things out for me :).  Watching out for
spaghetti, of course.

Cheers,
Peter