[postgis-users] [OT] Extract data from within polygons - not in Postgis

[Martin Davis]

You could try using JEQL.  It's a command-line tool which runs on Java, 
and provides a SQL-like language for performing spatial processing.

http://tsusiatsoftware.net/jeql/main.html


chlists at me.com wrote:
> Hi list,
> apologies for an off-topic question, but some of you osgeo wizards 
> might know an answer for my question. I need some help to do some 
> geoprocessing _outside_ PostGIS using available open source tools.
>
> I have two shapefiles - the first one containing 'master' polygons, 
> the second one can contain random features (lines, polygons or 
> points). I now want to iterate through all polygons of the first 
> shapefile and extract the features from the second file which are 
> located within a given master polygon. The extracted features should 
> also get some a new attribute based on which master polygon they are 
> located in. So essentially it is a  simple iteration over a 'within' 
> query.
>
> Can this be done without converting the shapefiles to a different 
> format using any of the existing open source tools (ogr2ogr, geos, 
> shapely)? I would prefer to use Python, and if possible, the solution 
> needs to be cross-platform (OS X, Win). If not, what would be the best 
> way to do this, preserving the attributes of the shapefiles?
>
> Any pointers greatly appreciated.
>
> TIA,
> Chris
>
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-- 
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022