Manuel,
Once you clip the layers, break the multi-part components apart use the following menu sequence "Vector > Geometry Tools > Multiparts to Single Parts" -- then they can be summed. You will need to relate you bits back to your buffer layers however, to match which bit goes in which buffer.
Alternatively, and easier in my mind, you could "Union" your layers. This creates an exploded layer where each bit has attributes of both parent layers. You can then delete those elements that do not have a buffer value. Two steps but less messy.
On 17/07/12 03:22, Manuel Spínola wrote:
Dear list members, I have a landuse layer and another layer with 20 circular polygons (buffers) and I want to obtain the amount of each landuse category within each circular polygon. I tried "clip" from Geoprocessing Tools but I dont get the information individualized for each circular polygon. Is it possible to get the landuse within each circular polygon in one step? Best, Manuel -- *Manuel Spínola, Ph.D.* Instituto Internacional en Conservación y Manejo de Vida Silvestre Universidad Nacional Apartado 1350-3000 Heredia COSTA RICA mspin...@una.ac.cr <mailto:mspin...@una.ac.cr> mspinol...@gmail.com <mailto:mspinol...@gmail.com> Teléfono: (506) 2277-3598 Fax: (506) 2237-7036 Personal website: Lobito de río <https://sites.google.com/site/lobitoderio/> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/> _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
-- Cheers Simon Simon Cropper - Open Content Creator Free and Open Source Software Workflow Guides ------------------------------------------------------------ Introduction http://www.fossworkflowguides.com GIS Packages http://www.fossworkflowguides.com/gis bash / Python http://www.fossworkflowguides.com/scripting _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
