KB10582 - I have overlapped shapes in my polygon layer. Sometimes the overlap order of the shapes changes at different zoom levels. What is wrong?

Probably nothing is wrong on the TatukGIS software side. Probably you are using spatial indexing (RTREE), which can return overlapping shapes in different orders at different zoom levels.

But you should not have overlapping vector shapes in a single layer. This would suggest that there are topology errors in your data.

Try using the Topology Builder/Corrector functionality in the TatukGIS Editor product to correct your data.