2008/11/10 Ed Loach <[EMAIL PROTECTED]>: > Robert asked: > >> Also, does adding a bridge section with a layer of 1 mean >> I should also tag the surface road with a layer of 0 or >> is the default no tag (layer 0) good enough? > > I think no tag of layer 0 is good enough. I only add layer=1 > (usually; occasionally 2 on complicated junctions) to the bridge, > and don't tag the layer 0 way(s). > > See > http://wiki.openstreetmap.org/index.php/Key:layer > and > http://wiki.openstreetmap.org/index.php/Key:bridge > > Having said that, some tags assume certain layers I believe. I think > for example landuse=<whatever> renders (at least in Osmarender) as > layer -5 to be behind everything else. Only for the internal layering structure - landuse areas are 'virtual features' so should be rendered at the bottom of the stack, even though they have no physical layering structure.
In short - only tag layer=* on physical features, not as a rendering hack. > I'm sure I read somewhere that water features such as rivers and > streams should be kept at layer 0 and any crossing ways then be set > appropriately (something about water can't flow uphill to a higher > layer), but I can't find that reference now. I think that's the general view from mailing lists, I don't think its explicitly documented anywhere though. -- Regards, Thomas Wood (Edgemaster) _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
