[OSM-talk-fr] Limites administratives espagnoles et frontières avec la France

[Christophe Merlet (RedFox)]

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)
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