Urban Cluster Outline Maps show the boundaries, names and codes of urban clusters, as well as the named features underlying the boundaries.

Urban Clusters (UC) = Densely settled core created from block groups or census blocks, and the adjacent densely settled surrounding territory (with a density of 500 people per square mile) that together have a minimum of 2,500 people but fewer than 50,000 people.

U.S. Census Bureau Census 2000 Map Products web site