Key:roof:orientation

The orientation of the roof of a building or building part. Mostly used for 3D tagging.

For roofs with a ridge, the ridge should be assumed to be parallel to the longest side of the building roof:orientation=along. But it can be tagged explicitly with this tag.

Note, however, that the interpretation differs between different 3D rendering applications. Osmbuildings.org switched in 2021 from this interpretation and now defaults to roof:orientation=across.

Examples

roof:orientation=*	description	example roof
roof:orientation=along	Roof ridge along the longest side of the building. This should the default, as most detached buildings are built that way.
roof:orientation=across	Roof ridge across the longest side of the building. Sometimes found in narrow buildings, for example building=house or building:part=*. Example picture shows a roofed sign post.

See also

• roof:direction=*
• roof:shape=*
• Simple 3D Buildings – core tags for 3D buildings
• 3D tagging – collection of additional 3D tags and related ideas

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