On 20 Oct 2009, at 14:44, Lesi wrote:
On 20 Oct 2009, at 12:05, Lesi wrote:how will you tag unmined deposits in such a scheme?If there is a unmined deposit, the mineshaft is not in use anymore -> disused=yesDo NOT use something like disused=yes as a modifier, you instead need to add an extra level of indirection, so that you don't end up having disused or closed things being confused with things that are still in operation.ShaunCould you explain this further, I do not understand what you mean.disused=yes is quite popular and used in combination with many other things.
I'll take an example of an amenity=cafe since it's one that I know slightly better.
If you just add a disused=yes, pretty much nothing that works with the OSM data will recognise that it is no longer a cafe. Instead you should use something like old_amenity=cafe, or amenity=closed;closed=cafe, that way there won't be any confusion.
As another example for when a road is under construction, you can use highway=constriction;construction=primary, thus routing engines won't route along that road. If you added a construction=yes or similar tag, it would require so much more complex logic in the processing of the osm data that it wouldn't be practical to do it this way.
Shaun
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