AbstractThe National Atlas of the United States 1:1,000,000-Scale Hydrography DatasetTrack: Cartography and Map Production Author The National Atlas of the United States produced a 1:1,000,000-scale (1:1M) hydrography dataset that consists of streams, waterbodies, and coastlines of the United States, Puerto Rico, and the U.S. Virgin Islands. Hydrographic features were selected, generalized, and refined from the National Hydrography Dataset at 1:100,000-scale to create regional networked geodatabases and nationwide shapefiles that can serve multiple cartographic and scientific purposes. The hydrographic features are vertically integrated with other 1:1M National Atlas cartographic frameworks such as transportation features and national boundaries. The harmonization of U.S. hydrographic data with 1:1M streams and waterbodies from Canada and Mexico supports mapping at continental and global scales through the North American Atlas and the Global Map. Florence Thompson USGS 8027 Exchange Drive Austin, Texas 78754 United States Phone: 512-927-3504 Fax: 512-927-3590 E-mail: fethomps@usgs.gov |