bounding polygon

[Tyler Mitchell]

Hi Thomas,
You could do it a few ways.  The one I'm most familiar with is to load the
shapefile into PostGIS and then use an SQL query to aggregate/combine the
features.  Then export it back into a shapefile.

The other way is to use the OGR libraries and write a small script in Python.

Both of these methods use the GEOS libraries behind the scenes.

If you'd like to dig further into either of these ideas let us know, or better
yet, get in touch with the PostGIS, GDAL/OGR and GEOS mailing lists.

Sorry for no simple answer, I'd love to hear about other ways of doing this
that are simpler.  Anyone have a python script to do this already?

Tyler

On November 27, 2004 03:10 pm, Thomas Chesky wrote:
> Hello,
>
> Is there a tool out there to create a shapefile containing one polygon,
> which is the combined boundary of another shapefiles's shapes?
>
> For example, I have a shapefile containing parcel polygons for a county. I
> want to create another shapefile based on these parcel shapes which
> describes the combined boundary of parcels (e.g. to be able to effetively
> check if a point is in the bounding polygon)
>
> Pls. let me know what is the best approach to get such bounding shape.
>
> Thanks
>
>
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