Re; tagging a (complete or longer segment of a) river with layer=-1 I don't understand why anyone would do this. That's it. Why?
Layer= tag clearly (logically) implies that some data is above or below some other data. At least to my logic. And I don't seem to be the only one with this thinking. At least OsmAnd renders all waterways with layer=-1 with dashed casing, as if they were underground, which to me makes sense, but what makes all rivers with this unnecessary tag render oddly. There are quite a number of such problematic waterways (also) in Nicaragua and Haiti. So, again : why tag things with with layer= tag when they are essentially on ground level = not above or below other data (or at least natural objects that might be mapped one day *) ? Am I missing something here? Cheers, -Jaakko *) I do add layer=1 to all bridges I map even if there wouldn't be any data under then at the moment and think that this kind of layer tag use makes sense -- Sent from my Android device. * +505-8845-3391 * http://about.me/jaakkoh El mar 14, 2014 8:52 a.m., "Fernando Trebien" <fernando.treb...@gmail.com> escribió: > Hello everyone, > > This is a small issue that came up recently in Brazil. In my > understanding, the layer tag has no specific meaning other than to > specify a rendering order. The wiki, however, states that it is wrong > to tag a whole river with layer=-1. The reason for that, as far as I > could figure, is because current validators (such as JOSM's or > KeepRight's) will not issue a warning on a waterway x highway crossing > when their layers are different, leading some users into tagging the > river with layer=-1 in order to get rid of warnings about missing > bridges and tunnels. So, I think that the validation rule is > inadequate: it should warn when a waterway crosses a highway that has > no bridge or tunnel tag, regardless of the value in the layer tag. > (Fords are the only exception, AFAIK.) > > Do you agree that the river can be tagged with layer=-1 as long as > this value is correct in relation to the layer of other > nearby/crossing ways? > > -- > Fernando Trebien > +55 (51) 9962-5409 > > "The speed of computer chips doubles every 18 months." (Moore's law) > "The speed of software halves every 18 months." (Gates' law) > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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