[postgis-devel] [PostGIS] #240: ST_SimplifyPreserveTopology documentation unclear on intersections within a MultiPolygon

[Martin Davis]

PostGIS wrote:
> if I have a MultiPolygon with
>  three polygons, two of them intersecting each other (A and B), is it
>  possible that B and C will intersect after ST_SimplifyPreserveTopology?
>   
Yes, it is possible that B and C will still intersect.  Nothing stricter 
can be stated - it is also possible that due to the simplification the 
intersection(s) will disappear (depending on the exact geometry around 
the intersection point).



-- 
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022