Key:building:levels:underground
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 building:levels:underground
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| Description |
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To mark number of levels under ground level 
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| Group: Buildings |
| Used on these elements |
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| Requires |
| Useful combination |
| See also |
| Status: in use |
| Tools for this tag |
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This tag is used for marking the number of underground levels of a building (building=*) or of a building part (building:part=yes).
For more information, see building:levels=*.
How to map
Use the tag on a closed way 
in combination with building=*. The value of building:levels:underground=* must be a non-negative integer (i. e. 0 or greater).
Do not use negative values! For above-ground building parts without connection to the ground, use building:min_level=* instead.
Examples
| building:levels:underground=* | Meaning |
|---|---|
| 0 | no underground levels |
| 1 | one level underground |
| 2 | two levels underground |
amenity=parking building=parking parking=multi-storey building:levels=0 building:levels:underground=2