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
