Key:roof:orientation
 roof:orientation
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| Description |
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Orientation of the roof surface(s) as the direction of the roof ridge. 
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| Group: buildings |
| Used on these elements |
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| Requires |
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| Useful combination |
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| See also |
| Status: de facto |
| Tools for this tag |
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roof:orientation specifies the orientation of a roof shape specified with roof:shape=*. This tag describes the direction of the roof ridge, not the roof surface(s) themselves. In most buildings, this roof ridge runs parallel to the longer of two building edges, which means along.
In contrast, the alternative roof:direction=* describes the orientation of the roof surface(s) itself. In the case of pent roofs (skillion) and square buildings, capturing with roof:orientation is not suitable; roof:direction must be used here. These two tags are alternatives, it is sufficient to use one of them.
Values
| roof:orientation=* | description | example |
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| along | The roof ridge runs parallel to the longer of two building edges.
This construction is the common variant, so many applications use along as the default value.
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| across | The roof ridge runs perpendicular to the longer of two building edges, parallel to the shorter.
This type of construction is the rare variant, but is often found at terraced houses.
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Rendering
The default value differs depending on the 3D application. Osmbuildings.org changed the default focus to across in 2021 (example).
See also
- Simple 3D Buildings - the central 3D tags
- roof:direction=* - specifies the orientation of a roof shape
- roof:ridge=* - additional linear recording of a roof ridge