Brent, I'm sure a few of us are interested - sounds good! :) Tyler
On 2011-03-02, at 8:28 AM, Dan Putler wrote: > Hi Brent, > > I can compile C++, and I'm interested. Is it possible to access the code? > > Dan > > On 03/02/2011 07:04 AM, Brent Fraser wrote: >> Dan, >> >> I've got some C++ code that uses GDAL (with a GEOS Union call) to >> dissolve polygons based on an attribute. If you can compile C++ code on >> Linux, you're welcome to it. >> >> Best Regards, >> Brent Fraser >> >> >> On 3/2/2011 12:31 AM, Dan Putler wrote: >>> Hi Paolo, >>> >>> Your point is well taken. What seem to be the best solutions involve >>> reading in a shapefile and then writing out a new one. I was starting >>> to lean toward either PostGIS or Spatialite by using a SQL script >>> sourced within the relevant cli shell since my guess was that they >>> would scale much better than any Python code I was likely to write. I >>> think I could automate things more with GRASS shell scripts than with >>> SQL scripts (there are over 3000 counties in the US). The geometry >>> cleaning GRASS does is a two edged sword, having all the benefits you >>> indicate, but at the cost of increased processing time. However, my >>> guess is that the benefits of the cleaning are worth the cost. >>> >>> Thanks for your advise. >>> >>> Dan >>> >>> On 03/01/2011 10:57 PM, Paolo Cavallini wrote: >>>> Il giorno mar, 01/03/2011 alle 23.25 +0100, Paolo Corti ha scritto: >>>>> Your only option here could be to use GRASS, but as far as I know you >>>>> need to import your shapefile to the GRASS database, use a GRASS >>>>> command (v.reclass [0]) and export back to shapefile the result, so it >>>>> is not very direct. >>>> Not very direct, but it's only one more command (v.in.ogr), with the >>>> additional bonus that importing into GRASS you can clean up invalid >>>> topologies, close empty gaps, remove unwanted overlaps, etc. >>>> All the best. >>> _______________________________________________ >>> Discuss mailing list >>> Discuss@lists.osgeo.org >>> http://lists.osgeo.org/mailman/listinfo/discuss >>> > > _______________________________________________ > Discuss mailing list > Discuss@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/discuss _______________________________________________ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss