[postgis-users] Topology and Triggers

[Kevin Neufeld]

Bruce Rindahl wrote:
> Has anyone thought about the Arc/Info coverage model?  The idea would 
> be to have a table with line geometries and attributes reflecting the 
> left and right polygon ids.  
Absolutely.   Much thought has gone into this already ... even a little 
development ... but I'm afraid that's where it stopped. 
http://www.postgis.org/support/wiki/index.php?PostgisTopology

see this thread...
http://postgis.refractions.net/pipermail/postgis-users/2007-October/017532.html

> My thought is you do your edits on the line geometry table and then 
> polygon topology is built in a separate (dependent, inherited??) table 
> based on the line table using well defined procedures.  The only 
> function I  don't see offhand that is not there is a split polygon 
> with line.  Just my thoughts.
>
> Bruce Rindahl
>
>