--- Jeff Dege <[EMAIL PROTECTED]> wrote: > In this application, that won't matter. But since in other > applications, it might, what do you mean by "using Topology"?
If you have two polygons sharing a corner (vertex), & simplify them, you can move the vertex differently in each case. In such cases you finish up with little slivers of overlap or gaps between the simplified polygons, who no longer share the same boundary at that location. You can also generate figure-eights (self intersections) in the polygon boundaries, which make the simplified versions invalid. For quick plotting purposes, this is generally irrelevant, but for querying point-in-polygon, etc, you will get wrong answers. Brent
