Key:tiger:LSAD

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Public-images-osm logo.svg tiger:LSAD
Osm element key.svg
Description
tag added by imports from official US sources, details legal type of administrative boundary Edit or translate this description.
Used on these elements
should not be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations
Wikidata
Status: in use

https://www.census.gov/geo/reference/lsad.html lists (maybe all) LSAD values and descriptions. For example the most common[1] values in OSM:

LSAD Description Associated Geographic Entity
21 borough (suffix) County Subdivision, Economic Census Place
25 city (suffix) Consolidated City, County or Equivalent Feature, County Subdivision, Economic Census Place, Incorporated Place
43 town (suffix) County Subdivision, Economic Census Place, Incorporated Place
47 village (suffix) County Subdivision, Economic Census Place, Incorporated Place
57 CDP (suffix) Census Designated Place, Economic Census Place

It is unclear whatever this tag is actually useful for some purpose.

In http://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2008/TGRSHP08.pdf it is defined as "Current legal/statistical area description code for subbarrio" and restricted to be string of (maximum?) length 2.