Am 01.01.2014 17:28, schrieb Fernando Trebien: > A combined approach makes sense to me. Then people can choose if they want > to use the tracktype tag or continue using just the surface tag (either may > make sense in different communities; I'd guess the German community will > prefer to use tracktype only with highway=track). I think the following > values of the surface tag could be considered paved: [none] (no surface tag > present), paved, asphalt, concrete, concrete:lanes, concrete:plates, > paving_stones, sett, grass_paver, cobblestone, metal, wood, tartan. I only partly agree on none for your wording to "be considered paved". If you mean "rendered as paved", I agree, but no information is no information here, and what's the default heavily depends on where you are. In many parts of Africa "none" should be considered unpaved by default, in many parts of Western Europe for highway=residential and above it would be paved. Therefore there should NOT be a rendered default assumption in the Mapnik Rendering where there is nothing. Leave it as it is no (undecorated) where no value is given.
> All > other values, including new and undocumented values, could be unpaved by > default. Why should all other values be unpaved, if you don't know about what it is? You simply don't know if a new value could be counted as paved or not without investigating that exact value. I could imagine new values for both, and if you propose rendering stuff with an assumption that is decided to be wrong for some values, this will lead to mappers not using correct tags or even tagging wrong to prevent "the map" to show what they would call wrong. > How about this? Moreover, TagInfo ( > http://taginfo.openstreetmap.org/keys/?key=surface) lists a few other > undocumented values that may be considered paved, such as > cobblestone:flattened (same as sett? to be discouraged?), bricks and > interlock (both similar to paving_stones?), cement (quite similar to > concrete?), stone and rocky and rock and limerock and granite (similar in > practice to sett or cobblestone?). You see: There's quite a lot, so don't use defaults here when applying rules to the default map rendering. The Mapnik Map IMHO should show what's in OSM, not what one could estimate out of it. regards Peter _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
