On Sunday 22 June 2014, Tor wrote: > > As far as I know, they are split that way in the SOSI files from > Kartverket. I agree that it’s best to merge them. I have no idea > about how to do that with OGR though.
In principle dissolving all polygons in a file can be done through something like ogr2ogr -explodecollections -dialect SQLite -sql "SELECT ST_Union(geometry) FROM input" output.shp input.shp If you only want to merge elements with certain attributes you need some more SQL magic with 'group by'. > Not in the N50 Arealdekke dataset as far as I know. The names are in > a separate N50 dataset. It has been discussed on the Norwegian > mailing list, and people agreed that it would be better to import > names from the original source, the place name register (sentralt > stadnamnregister, SSR). Well - it is of course up to you but if there are matching data sets it is usually easier to attach names to certain features and then import the whole thing than add name tags to existing OSM elements later when they might have already been modified manually. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
