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 Data base (census geographic) See TIGER data base.

Decennial census The census of population and housing, taken by the Census Bureau in years ending in 0 (zero). Article I of the Constitution requires that a census be taken every ten years for the purpose of reapportioning the U.S. House of Representatives. The first census of population occurred in 1790; the census of housing has been conducted since 1940. See also reapportionment, redistricting.

Delineate To draw or identify on a map the specific location of a boundary.

Dependent place An incorporated place or CDP that is legally or statistically part of the county(ies) and/or county subdivision(s) within which it is located; the statistical data for the place also are tabulated as part of the total for the county(ies) and/or county subdivision(s) that these data are part of. There are three types of dependent places: (1) an incorporated place that is legally part of the county(ies) and/or MCD(s) within which it is located, (2) an incorporated place that is legally part of the county(ies) and statistically part of the county subdivision(s) within which it is located, and (3) a CDP that always is statistically part of the county(ies) and county subdivision(s) within which it is located. See also incorporated place, independent place.

Detach To legally remove an area from a governmental unit, usually an incorporated place, by an ordinance, a court order, or other legal action. Also refers to the act or process of being separated from a governmental unit. See also annex.

Disincorporate To end the legal existence of an incorporated place as an active or inactive governmental unit through legal action by the incorporated place, or a county/State. See also active governmental unit, disorganize, functional status (governmental), functioning governmental unit, inactive governmental unit. GlossaryG-19