On Tue, Oct 20, 2009 at 8:26 PM, Tobias Knerr <o...@tobias-knerr.de> wrote: > Because tags like disused=yes conflict with a general principle in OSM: > We don't have a fixed set of tags and mappers can invent and use their > own tags, so it should be possible for software to ignore tags it > doesn't know without causing problems. If I don't support distinguishing > between different variants of amenity=parking, I just ignore parking=* > tags entirely, and while the result is less useful, it's still correct. > If I don't support disused features, I can just ignore disused=yes tags > ... no wait, I can't.
Okay, but what if the tag is "man_made=mineshaft"? Is it safe to ignore the "disused=yes" tag then? I don't see why not. It's not like "man_made=mineshaft" means you can grab a pickaxe and go head for it. A mineshaft defaults to *not* being accessible to the public. Whereas a parking lot defaults to being *accessible* to the public (in fact, that's even in the definition, though the definition is somewhat ruined with the weasel-word "Generally"). Bottom line, is "man_made=mineshaft" a tag to represent the physical presence of a mineshaft, or is it a tag to represent the use of a mineshaft in mining? If the former, disused=yes is fine. If the latter, it isn't. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
