[postgis-users] Overlapping of polygons with SimplifyPreserveTopology

[Luca Morandini]

Folks,

we noticed that, despite the use of ST_SimplifyPreserveTopology, non-adjacent 
polygons may overlap; this happens when there is a long and narrow water body of 
between them (think of a fiord), but this body is not itself a polygon.

To solve this issue we came up with the idea of adding an "universe polygon"; that 
is, a polygon that enclose the entire extent of a table, so that every polygon has 
a left and right polygon: would this do the trick ?

Regards,

Luca Morandini
Data Architect - AURIN project
Melbourne eResearch Group
Department of Computing and Information Systems
University of Melbourne
Tel. +61 03 903 58 380
Skype: lmorandini