Hi list, I experience some difficulties related to v.patch and category / attributes when merging vector maps together.
I've read the following thread : osgeo-org.1560.x6.nabble.com/Appending-a-map-to-another-td5176882.html and proceeded the way Markus dis explained it. FI 'm working with grass70. *Point I : * As Tommaso said (in mentioned thread), I noticed that the /v.category option=sum to change the categories / doesn't seem to be needed because grass reclass it automatically. Is this correct ? *Point II* More problematic, opening attributes table, I can see the following cats : 10003 30006 60009 70013 90017 120021 And /v.category input=poly_iso option=print layer=1 id=1-50/ will return same values but displaying it on the map shows both boundaries and areas - And retrieving attributes on click will only work on areas. On the image below, I have 3 areas (sometimes it is 2). <http://osgeo-org.1560.x6.nabble.com/file/n5209201/v.png> And exporting with /v.out.ogr/ says that features without category were skipped - here 3 (on a total of 6). I use v.patch in a loop and do as follow : Thanks for your help. I'm struggling with that ! -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Appending-map-to-another-with-GRASS-7-tp5209201.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user