Key:tiger:CLASSFP

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Public-images-osm logo.svg tiger:CLASSFP
Osm element key.svg
Description
FIPS 55 class code - tag of and unclear purpose added by imports from official US sources 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

Meaning of that tag is unclear[1] and it is dubious whatever it should be present on any object.

In http://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2008/TGRSHP08.pdf it is defined as "Current FIPS 55 class code" and restricted to be string of (maximum?) length 2. FIPS 55 class codes seems to be defined at https://geonames.usgs.gov/domestic/fips55codedef.html

In OSM database values tiger:CLASSFP=C1, tiger:CLASSFP=U1, tiger:CLASSFP=C5, tiger:CLASSFP=U2 dominate[2].