Note that the GRB data mentions it's "voorlopig", and often, the data shows an offset from parcel boundaries. At those places, I would expect the boundaries to follow parcel boundaries (and I expect parcel boundaries to be of better quality).
2016-06-01 19:01 GMT+02:00 joost schouppe <joost.schou...@gmail.com>: > very true... 100 meters would be vast imho. A difference of 5 meters I >> would think that is pretty much ok, although the importance of that can >> be big when borders cross buildings. >> >> Exactly, I think the definition of correct is pretty narrow here. > > >> More important: remember that those boundaries usually align on each >> other, so when you make a admin level 8 smaller, you -probably- also >> need to modify all others as well. e.g. If you make north border of >> Antwerp smaller, you probably need to make Belgium smaller too, AND the >> province etc. probably even from level 1 down to 9 if you want to do >> this well. At the least we will need to verify them to make sure. >> >> Yes, this is something to keep in mind. As long as you don't go splitting > ways in the wrong place, that shouldn't be a problem though, right? If they > are properly mapped, boundaries like that should reuse the same segments > over and over again, so correct one and you correct all the others. E.g. > http://www.openstreetmap.org/way/87806314 > > > >> GRB data actually has border information if I remember correctly. some >> of their map layers (tiles) show the level 8 boundary (a very fine line >> though, almost invisible). >> >> I think this is the one: > https://download.agiv.be/Producten/Detail?id=1217&title=Voorlopig_referentiebestand_gemeentegrenzen_toestand_29_01_2016 > > > > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-be > >
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