Sory, the previous post was not to this list. 2010/8/27 Espen Isaksen <espen.isak...@gmail.com>
> Hi! > > I have a set of polygons where I have dissolved some of the polygons. > So I get two sets of polygons where one set is my original data, and > the other set is new polygons from the dissolve operations. Now I want > to extract the remaining polygons from my original dataset which were > not dissolved. I tried just a simple st_difference, but from what I > understand this operation does now work on sets of polygons. > > Both datasets can be found here in shape format: > http://dl.dropbox.com/u/8829/postgis.zip > > How can I extract only the remaining polygons from the original > dataset. I had a look at this > post(http://www.postgis.org/pipermail/postgis-users/2008-May/019511.html) > in the mailing list, but I did not succeed in changing it to fit my > purpose. > > Can anybody help me out? > > Kind regards, > Espen Isaksen > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users >
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