Simplified state outline data?

[Brent Wood]

--- Jeff Dege <jdege at KORTERRA.COM> 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