|building = roof|
|A building open on at least two sides.|
|Used on these elements|
|Status: In use|
|Tools for this tag|
How to map
- The way and building=roof do not need a distinct layer (unless required for other reasons).
- The way should have shared nodes with the building where it crosses the outline of the building.
- The way should be tagged with covered=*. When the two walls of the building=roof form a tunnel without an open side use tunnel=building_passage instead.
Other features on the ground below the roof should be mapped like if they were in any other building. If there are already other features below or above the building=roof on the map, layer=* should be used to provide information about orientation of features. In addition covered=* may be used to mark objects (for example roads) as covered by roof.
- building=* + wall=no is in use for buildings without (some) walls
- man_made=canopy is in use for canopy like roofs
- building=carport is proposed in Proposed features/carport buildings
Usage in Sweden
This is a minor import but: This tag was recently used in an import in Sweden; It was used to denote, among other things, buildings that have two walls or less. This means can mean e.g. a front porch. So when it was surveyed the buildings had two or less walls, but it's noted that new walls can later be added by the owners and the data can not be 100% on what the current state is.