[postgis-users] Simplifying Polygons

[Francois Hugues]

Hello,

This is an ordinary problem and there are tow solution to solve it :
- a plpg function wrote by nicolas ribot : http://trac.osgeo.org/postgis/wiki/UsersWikiSimplifyPreserveTopology
- a function wrote by sandro santilli using the new topology functions of postgis 2 : http://strk.keybit.net/blog/2012/04/13/simplifying-a-map-layer-using-postgis-topology/
And also a related approach by Nicolas ribot : http://trac.osgeo.org/postgis/wiki/UsersWikiSimplifyWithTopologyExt

With all this stuff, you should manage to do what you want

Hugues.


________________________________________
De : postgis-users-bounces at postgis.refractions.net [mailto:postgis-users-bounces at postgis.refractions.net] De la part de Steve Horn
Envoyé : mardi 26 juin 2012 14:39
À : postgis-users at postgis.refractions.net
Objet : [postgis-users] Simplifying Polygons

Hello!
Having a a client-side performance problem due to a large number of polygons being brought down to a Google Map. Sometimes the GZipped response is around 2MB worth of GeoJSON.

I'm hoping that I can partially solve the problem by simplifying the polygons using ST_Simplify. The problem I'm running into is that the polygons are all contiguous and after simplification they are not connecting with each other. (See attached image) 

Anyone know how I can simplify the polygons and keep them all "fitting together"?


-- 
Steve Horn