Videresendt melding:
> Fra: Christoph Hormann <[email protected]> > Dato: 22. juni 2014 15:43:39 CEST > Til: [email protected] > Emne: Re: [Imports] N50 imports from Kartverket (The Norwegian Mapping > Authority) > >> 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
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