Tag:boundary=historic

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Public-images-osm logo.svg boundary = historic
Osm element tag.svg
Description
A historic administrative boundary kept temporarily in OSM to avoid recreation Edit or translate this description.
Group: Boundaries
Used on these elements
should not be used on nodesmay be used on waysmay be used on areasmay be used on relations
Useful combination
See also
Wikidata
Status: in use

A historic administrative boundary. Subdivisions of areas/territories/jurisdictions recognised by governments or other organisations for administrative purposes.

Note that though historic objects should not be mapped as it is outside of scope of OSM (unlike projects like Open Historical Map), it makes sense to keep for some time old boundaries after administrative division change as form of note to make clear that there was a recent change of borders in a given location. Using this tag is alternative to using note=*.

The boundary=historic tag is used on ways way. It may also (or instead) be used on a relation grouping several ways.

See comparison of life cycle concepts for more possibilities.

Note that OpenStreetMap is not a correct place to map borders of historical entities like Nazi Germany, Roman Empire or Polish-Lithuanian Commonwealth that are not going to be mapped by people mistakenly thinking that these entities exist.

admin_level

admin_level=1 to 10 may be used in adition to further clarify situation.

See also