Township (congressional or survey) A unit of land created under the PLSS for the sale of public lands. A survey township is usually a six-square-mile area consisting of 36 one-square-mile sections aligned along cardinal compass points. Survey townships have not been used for decennial census tabulations in recent decades except where they are organized into a civil township; if unorganized, the area is treated as the statistical equivalent of an MCD, called an unorganized territory. See also organized territory, public land survey system, township (civil or governmental), township and range system, unorganized territory.
Township and range system A common name for the United States Public Land Survey System, which covers 29 whole States and part of Ohio. See also public land survey system, township (civil or governmental), township (congressional or survey).
Traffic analysis zone (TAZ) A special-purpose geographic entity delineated by an MPO for tabulating transportation statistics from the decennial census.
Transportation (census) See economic census.
Tribal designated statistical area (TDSA) A statistical entity delineated for the 1990 decennial census by an American Indian tribe recognized by the Federal Government or a State government when that tribe does not have a land base (reservation). It encompasses the area that includes the American Indian population over which the tribe has jurisdiction. A TDSA cannot overlap with a Federal or State reservation or American Indian trust land; it also cannot cross a State line, and must be delineated following census block boundaries. See also tribal jurisdiction statistical area.
Tribal jurisdiction statistical area (TJSA) A statistical area identified and delineated for the 1990 decennial census by American Indian tribal officials in Oklahoma. They encompass the area that includes the American Indian population over which the tribe has jurisdiction. TJSAs replaced the Historic Areas of Oklahoma recognized by the Census Bureau for
