Hello, I've tested it and it works fine for me (when configuring the 'Group functions', by selecting field "area" and then checking "Summatory", of course). If possible, you can send us the original shape in order to test it a little more and look for the problem.
Regards, Sergio. Sergio Clark Equipo gvSIG IVER T.I., S.A. www.iver.es www.gvsig.com ernesto sferlazza escribió: > Hello developers, > I have performed a "dissolve" geoprocessing on a shapefile of > municipalities to obtain a shapefile of provinces, based on the field > "Code_Prov" (code of the province). In the municipalities shp I have > previously calculated the area of each polygon. In the resulting > shapefile, the "sum" area of each group is very different from the sum > of the values of the polygons grouped. There is also a strange > behaviour: the value of the sum_area increases when the feature_id > increases. > If I calculate again the area of the dissolved polygon the result is > correct (and corresponds exactly with the sum of the areas of the > grouped polygons).. > I have tried both with the versions 1.1.2 and 1.9 (build 1243). > Best regards > Este mensaje y sus archivos son confidenciales. No está permitida su reproducción o distribución sin la autorización expresa de "IVER Tecnologías de la Información". Si usted no es el destinatario previsto, queda desautorizado cualquier uso, acceso o copia de este mensaje. Si ha recibido este mensaje por error, por favor bórrelo e infórmenos por esta misma vía. _______________________________________________ Gvsig_internacional mailing list [email protected] http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional
