After the roof shape has been drawn it should be moved to match the location on the ground level.
Osm roof shapes.
This section is a wiki template editable here.
I have heard that we can do that in osm.
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.
To accomplish that move the way until the corner of the roof touches the best visible corner edge of the building.
How to tag roof orientation for roof shape side hipped and similar roof shapes.
This tag should be added for roof shapes.
In case of ways below the roof.
Hipped left and gabled right roof shapes.
Draw along the outline of the roof apply rectangularization e g.
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.
This should be self explaining.
0 i am trying to identify rooftops of all buildings for a part of a city.
Additional roof shapes are suggested in s3db proposals including advanced approaches for manual modelling e g proposedrooflines or parts of osm 4d roof table.
How to identify rooftop in osm.
However they all seem to be mostly symmetric.
Simple 3d buildings on the osm wiki defines several roof shapes.