2013/1/27 François Lacombe <francois.laco...@telecom-bretagne.eu>: > 2013/1/27 Martin Koppenhoefer <dieterdre...@gmail.com> >> the sense in OSM is perfectly clear and defined in the osm wiki: >> power=station describes a substation for high voltage. >> power=sub_station is a substation for transforming medium to low >> voltage. This is also defined in the wiki. > > This discussion shows there's a little doubt about the correctness of this > business.
yes, you can always find someone in OSM who disputes the way stuff is mapped. I also agree with you in principle that the current situation is unfortunate, because the tags are not corresponding with the actual linguistic meaning of the words used, and this might cause confusion and problems. Redefining the same tags also causes confusion and most probably wrong tagging. Your ideas are not stupid (using different words instead of redefining in-use ones, e.g. substation for substations (instead of the in-use "sub_station") and plant instead of station or generator (hope I got this right and this is what you want). Still a different key would make it less error-prone (the differences are somehow subtle and you want to reuse generator for generators i.e. a different thing than what they are used now). > If mappers see a substation, they can map a substation in OSM, > power=substation. > But if they can't determine the voltage, they're not required to put this > information in their upload instead of publishing wrong data. OK, but then they would have to map this: http://www.flickr.com/photos/mamboman/448479749/ and this: http://www.flickr.com/photos/rene-germany/5723334544/ http://www.flickr.com/photos/zarner01/6899597110/ with the same tags. Why not have distinct classes for those two? > Putting two tags instead of one allows people to act like that. why using 2 tags if you can solve it with one ;-) > How can you be sure the distinction you made is right if voltage isn't > mandatory in the equation? 2 main tag-values for quite different looking objects ensure (in my opinion) much better the consistency of the data than relying on voltage-values (which also might be missing quite a lot, following your own suggestion to omit this in case of doubt). cheers, Martin _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
