OpenGeofiction
Is there a Tag that lets you make a building a bridge over a road.
Posted by MortyFontaine on 18 March 2016 in English.I’m currently mapping out a hospital in my city Fort Johnston (in Commonia) and I want to create a flyover bridge to connect two different buildings across a road. Is there a special tag I should use or way so that it appears correctly on the map?
Discussion
Comment from Luciano on 18 March 2016 at 06:47
The easiest way is to use the “layer” tag. So the street can be no layer tag, and the building can be “layer=1”. Alternately, the street can be “layer=-1” and the building can have no layer tag. This is sufficient for rendering, I think.
Depending on the style of flyover, however, there are other ways to tag. If the flyover is just an enclosed footway bridge over the street (called a “skyway” in some parts of the US), I think the best tagging is something like “bridge=yes” “layer=1” and “highway=footway”. Alternately, if the building is substantial and the street goes “through” it, then you could tag the street as “tunnel=building_passage” and “layer=-1”.
You can research more tagging options at the OSM wiki:
osm.wiki/Key:layer
Happy mapping.
Comment from Sarepava on 18 March 2016 at 11:50
You can build the bridge into the building as one object in the same layer, and then use the style ‘tunnel’ and type ‘building passage’ for the roadways.