On 01/05/2013 05:46 PM, Paul Meems wrote:
Hi all,

As some of you already know we are changing MapWindow GIS to let it use more OGR/GDAL methods instead of our own/other libraries. Until now we have 'migrated' a lot of functionality and we are very pleased with it.

We still have a few methods left we have not yet migrated, because I'm having trouble finding the equivalent gdal/ogr methods.
So my question is: How can I do the following tasks using GDAL/OGR.

* Convert 3D shapefile to 2D shapefile
* Clip polygon with a line (shape in a different shapefile)
* Clip shapefile with polygon (shape in a different shapefile)
* Erase shapefile with polygon (shape in a different shapefile)

For the last two there probably are Layer methods:

http://www.gdal.org/ogr/classOGRLayer.html

Examples here: http://trac.osgeo.org/gdal/wiki/LayerAlgebra

I'm not sure about the 2nd one.

Ari


We have compiled GDAL with GEOS so we can access those methods as well.

Thanks in advanced.

Paul

*Paul Meems *
Release manager, configuration manager
and forum moderator of MapWindow GIS.
www.mapwindow.org <http://www.mapwindow.org/>

Owner of MapWindow.nl - Support for
Dutch speaking users.
www.mapwindow.nl <http://www.mapwindow.nl/>

*
*



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