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 County subdivision A legal or statistical division of a county recognized by the Census Bureau for data presentation. See also barrio, barrio-pueblo, census county division, census subarea, census subdistrict, city, gore, grant, island, location, minor civil division, municipality, plantation, purchase, town, township, unorganized territory, village.

County Subdivision Outline Map A State-based map depicting the boundaries and names of the counties and equivalent entities, county subdivisions, AIANAs, and places for which the Census Bureau tabulated 1990 census data. These maps are issued as electrostatic plots consisting of only one or a few map sheets for each State; they also are available in smaller scale, sectionalized form in census publications.

Crews of vessels The shipboard populations of U.S. Navy, U.S. Coast Guard, and merchant marine vessels. For a decennial census, they are assigned to the offshore area adjacent to the land area that contains the facility, pier, or dock associated with the ship; this location is assigned a unique census tract or BNA number, with a suffix of .99, and a unique block number of either 199 (for a military vessel) or 299 (for a civilian vessel). This area is more conceptual than geographic, and has no area measurement assigned to it.

CRF See City Reference File.

CSA See census subarea.

CSAC See census statistical areas committee.

CSAKP See census statistical areas key person.

CTKP See census tract key person.

Cultural feature Any type of artificial feature, such as a street, power line, or fence. See also feature, natural feature, visible feature. G-18Glossary