Hipped left and gabled right roof shapes.
Osm roof shapes.
This should be self explaining.
How to identify rooftop in osm.
This tag should be added for roof shapes.
In addition covered may be used to mark objects for example roads as covered by the roof.
How to tag roof orientation for roof shape side hipped and similar roof shapes.
Simple 3d buildings on the osm wiki defines several roof shapes.
After the roof shape has been drawn it should be moved to match the location on the ground level.
Either all ways below roof or the roof should get a layer tag.
In case of ways below the roof.
This section is a wiki template editable here.
To accomplish that move the way until the corner of the roof touches the best visible corner edge of the building.
If there are already other features below or above the roof on the map layer should be used to provide information about stacking of features.
In the area where i was thinking of tagging roof shapes it is a very common pattern to have the roof be hipped towards the end of the building that faces the street and gabled in the back.
I have heard that we can do that in osm.
Additional roof shapes are suggested in s3db proposals including advanced approaches for manual modelling e g proposedrooflines or parts of osm 4d roof table.
Draw along the outline of the roof apply rectangularization e g.