2009/12/5 Christophe Merlet (RedFox) <[email protected]>: > Le samedi 05 décembre 2009 à 14:56 +0100, Skywave a écrit : >> I was talking about the comparison between Cadastre and the Spanish >> Data, i don't have the exact data of the borderstones, but the Spanish >> data seems to be following it more, the Cadastre data has more curves >> but the difference is measured in centimers not meters. There are a >> few bordersstones in the database, one by me, a couple by others, they >> match both the Cadastre and the Spanish data. But imo if you would >> draw a line between each borderstone it would look more like the data >> from the Spanish source > > Now, I know the tag for borderstone (historic=boundary_stone) :) > but it's not rendered by mapnik :( > >> And i know the difference between cadastre, CIA, and the Spanish data, >> as they were imported by me in that region. Cadastre.fr has of course >> also country borders as they share borders, the Spanish data i got >> from a file sent by the importer, the CIA data should be deleted as >> soon as possible. > > OK, that allright. > >> The data from the French cadastre is just fine for the purpose in OSM, >> i have only slightly altered the existing Cadastral borders in the >> Pyrenees Orientales: i cleaned out some unnecessary nodes and cutted >> it in pieces to fit in the Spanish relations. I've deleted the >> Andorrian-Spanish border, as it was from the CIA world databank >> >> http://www.openstreetmap.pl/balrog/limites-omitidos.osm.bz2 > > > Beware with your limits, it's not always better. It does not follow > natural border like river > > Arneguy > http://sautter.com/map/?zoom=16&lat=43.10889&lon=-1.28235&layers=00B000TFFFFF > > Border stone #225 > http://sautter.com/map/?zoom=18&lat=43.00806&lon=-1.14266&layers=00B000TFFFFF > (here, french cadastre is also not really exact :/ Track way from my own > GPS should be in France...) > > > Librement, > -- > Christophe Merlet (RedFox) >
My piece of border mainly existed out of Col's and peaks, not many rivers, couple of streams probably. The limits will probably always be different in different sources and i presume nobody in the real world cares either about that small surface of rock ;). Openstreetmap will never be able to really check the whole border. For that borderstone, keep in mind, GPS isn't very precise either. _______________________________________________ Talk-fr mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-fr
