Le samedi 05 décembre 2009 23:00:36, Skywave a écrit : > 2009/12/5 Christophe Merlet (RedFox) <red...@redfoxcenter.org>: > > 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=00B000TF > >FFFF > > > > Border stone #225 > > http://sautter.com/map/?zoom=18&lat=43.00806&lon=-1.14266&layers=00B000TF > >FFFF (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.
Visiblement il n'y a que 3 bornes déjà en place http://cassini.toolserver.org/~kolossos/qtm2/featurelist.php?key=historic&value=boundary_stone&types=points- areas-infos&BBOX=-2,43.5,3.5,42 De plus j'en ai trouvé approximativement 30 dans les repères géodésiques et de nivellements. Il faudrais voir à faire une petit script pour importer des données depuis les CSV des fiches IGN, si ça n'a pas déjà été fait pour les châteaux d'eau. _______________________________________________ Talk-fr mailing list Talk-fr@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-fr
