[OSGeo-Discuss] Command line tool for dissolving polygon boundaries
nsicad at gmail.com
Tue Mar 1 17:41:41 PST 2011
I am using Spatialite CLI for to this job.
1. Import shapefile into Spatialite
2. Create CSV.file for the counties
3. Use Vitual table for counties.csv
4. Use ST_UNION to create a new table with dissolved boundaries
5. Dump the new spatialite table to Shapefile file
On 3/2/11, Simon Cropper <scropper at botanicusaustralia.com.au> wrote:
> On 02/03/11 08:37, Dan Putler wrote:
>> Is there a FOSS command line tool that runs under Linux for dissolving
>> polygon boundaries based on a field in an attribute table that (ideally)
>> works directly with shapefiles? There are a number of non-cli tools out
>> there, but I'm working with all US counties on a county by county basis,
>> and wanted to avoid importing each individual county into another product.
>> Discuss mailing list
>> Discuss at lists.osgeo.org
> My understanding is that SAGA can be accessed using the command line.
> Check out this page...
> If you intend to create a bash script to dissolve your shapefiles, it
> would be just as easy I presume to write a script that opens the
> shapefile, dissolves the polygons, then closes it; progressively working
> through the list of counties. Remember most packages have the ability to
> run script. gvSIG uses Jpython, QGIS python, etc. I fact from what I can
> tell you can actually import QGIS modules into python.
> Cheers Simon
> Simon Cropper
> Principal Consultant
> Botanicus Australia Pty Ltd
> PO Box 160, Sunshine, VIC
> W: www.botanicusaustralia.com.au
> Discuss mailing list
> Discuss at lists.osgeo.org
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