United States Geological Survey (USGS) 1:24,000 Topographic Quadrangle Series Index is a polygon theme representing the geographic extent of USGS 1:24,000 topographic maps (7.5- by 7.5-minute quadrangles) for the coterminous U.S. forty-eight states and District of Columbia. This dataset is a part of the 2010 ESRI Data & Maps collection