Iván, Thank you for your reply, I'll try my best to make it accurate!
If you want to be extra accurate, you'll have to survey the boundary > milestones along the border, recalculate river centerlines and try to match > everything to old documents. Regarding rivers, I normally disregard mapping the administrative limit that overlaps a river because I use the river itself, with up-to-date imagery, to find the center line of it. Would you do it differently? Speaking of disputes and old documents, what's your point of view about > Olivenza? I suggest you get up-to-date on how to tag territorial disputes > in > OSM. I believe OSM's maxim of following the "ground truth" so I'd say Olivenza is for all intents territory of Spain. Still, I can look into disputed territories like Crimea to get an idea of what to do and do something about it in Olivenza. 2015-04-09 12:47 GMT+01:00 Iván Sánchez <i...@sanchezortega.es>: > El Jueves 9. abril 2015 12.21.12 Marcos Oliveira escribió: > > I'm also looking for the official data you use to map Spain's > > administrative limits > > What you want is the files for "Líneas Límite Municipales" from here: > > > http://centrodedescargas.cnig.es/CentroDescargas/equipamiento.do?method=mostrarEquipamiento > > Be aware that Spain doesn't have one "true" set of boundaries. Some > municipalities have different data than the regional goverment, which might > have different data than the national government. Usually the difference > is no > bigger than a few meters in the worst case. > > Submeter accuracy for boundaries doesn't seem like a big problem, until > you're > faced with the problem of taxing buildings & constructions which lay > exactly > on a boundary (e.g. http://www.openstreetmap.org/#map=19/40.78820/-4.00284 > - I > know, first-hand, that there was a small dispute between regional > governments > about who should tax one of the water depots there) > > If you want to be extra accurate, you'll have to survey the boundary > milestones along the border, recalculate river centerlines and try to match > everything to old documents. > > Speaking of disputes and old documents, what's your point of view about > Olivenza? I suggest you get up-to-date on how to tag territorial disputes > in > OSM. > > > > As a closing note, I'm writing this in English because I'm afraid I'd do > a > > lot of grammatical errors and be misunderstood if I wrote in Spanish. To > > identify myself, I'm ViriatoLusitano. [1] > > Vc pode falar portunhol, a gente vai comprender ;-) > > > -- > Iván Sánchez Ortega <i...@mazemap.no> <i...@sanchezortega.es> > > _______________________________________________ > Talk-es mailing list > Talk-es@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-es > -- Um Abraço, Marcos Oliveira
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