[postgis-users] Simplify a perfect (hierarchical) partition of polygons (ST_SimplifyPreserveTopology and friends)

Stephen Woodbridge woodbri at swoodbridge.com
Tue Mar 13 09:21:07 PDT 2012


The reference to "follow the yellow brick roads" is indeed a reference 
to the Wizard of OZ and could be interpreted as to set out on a journey 
full of perils and unknowns. :)

That said, there have been a lot of posts on the list about using 
topology. The idea would be to load your polygons into a topology then 
simplify the edges, and extract you polygons again.


Will get you most of the links you need to get started.


On 3/13/2012 1:51 AM, Martin Tomko wrote:
> Hi strk,
> Hm, that did not help me much. Would you have any pointers on how to
> proceed? So far, I found out that it is the Wizard of Oz, so I guess I
> will continue by reading it… ;)
>     - maybe try some tricks using the Postgis2.0 planar topology functions
> Follow the yellow brick road !
> --strk;
> --
> Martin Tomko, PhD.
> Senior Project Manager, Information Infrastructure Design, AURIN
> Level 5, Architecture Building
> University of Melbourne VIC 3010
> T: +61 3 9035 3298
> E: tomkom at unimelb.edu.au < mailto:tomkom at unimelb.edu.au >
> W: www.aurin.org.au <www.aurin.org.au>
> W: http://www.tomko.org
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