Tag:building=collapsed

This feature has been labeled as deprecated. The recommended replacement is: demolished:building=* or building=ruins or delete object.
The reason is documented in Deprecated features. You are still free to continue to use or interpret this tag as you see fit since OpenStreetMap does not have “banned features”.
Under no circumstances should you (semi-)automatically change “deprecated” tags to something else in the database on a large scale without conforming to the automated edits code of conduct. Any such change will be reverted.

building=collapsed is problematic for multiple reasons.

• Remains of a collapsed building are no longer a building and should be not tagged as building=*. Delete the object representing no longer existing building or use demolished:building=* if there is a significant risk that other mappers may mistakenly recreate it.
• building=* is used to tag the construction type, for example building=church is for any building constructed as a church, no matter how it is used currently. building=collapsed erases distinction between collapsed church, collapsed warehouse, collapsed barn and so on.

How to map no longer existing buildings?

OSM is not a place for mapping no longer existing things.

But sometimes recording that building is gone may be useful, for example to avoid remapping by armchair mappers using outdated aerial images. Consider retagging such objects as demolished:building=* if there is a significant risk that other mappers may mistakenly recreate it.

Once there is no risk of accidental recreation, such objects should be deleted.

See also

• Lifecycle_prefix to tag objects with a status such as disused, abandoned, demolished, historic, destroyed.
  • demolished:building=* for buildings which have been removed, with no traces left
  • ruined:building=* for buildings are in ruin, but which are still useful for navigation and visible in the landscape
  • destroyed:building=* for buildings that were destroyed by an event other than intentional demolition, such as a natural disaster. Remains may still be present. Should be changed to demolished or deleted once removed from the field.

• for ruins
  • building=ruins used to mark ruined buildings
  • historic=ruins for structures which are fallen apart
  • ruins=* to indicate that a feature is ruined or what kind of historic ruin it is