Urban and built-up areas:
A classification in the natural resources inventory, now called developed areas, that includes cities, villages, other build-up areas of more than 10 acres, industrial sites, railroad yards, cemeteries, airports, golf courses, shooting ranges, institutional and public administration sites, and similar areas. The 1992 national resources inventory placed over 92 million acres in this category, an increase of 14 million acres since 1982.
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