On Wed, Apr 8, 2009 at 6:48 PM, Richard Fairhurst <[email protected]>wrote:
> Tagwatch suggests that surface=paved, unpaved, gravel, cobblestone, ground > and grass > are the most common values (those with over 10k uses). > cheers > Richard > > (This was in response to my assertion that surface was unrenderable) The surface key is specified for about 8% of highway=footway (in Europe), with paved/unpaved roughly even. The surface key is specified for about 20% of highway=path, mostly unpaved. Key:surface works as a supplementary key for roads (because paved can be assumed to be the default), but doesn't work very well for non-motor highways, where the surface could reasonably be quite a range of things (and where "unpaved" could cover quite a range of smoothnesses). For surface to be renderable, there either needs to be a clear default assumption for each highway tag value, or a clear understanding that surface always needs to be added for those tag values where it's unclear (don't hold your breath on that last one). It's simpler to associate "path" with non-made-up and "footway" with "made-up", and this seems to largely match the majority of usage of "path" so far. Time to write this into the "designation" proposal. Richard (West Oxford)
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