U.S. Department of the InteriorU.S. Geological Survey
National Atlas of the United States 1:1,000,000-scale Hydrography Dataset
By Florence ThompsonU.S. Geological Survey-Texas Water Science Center
2 million-scale to 1 million-scale
Why 1:1,000,000 scale?
Global Map
North America
United States
Why Hydrography?
Waterbodies, Coastlines, Streams, Streamgages
Four National Shapefiles
21 Regional Networked Geodatabases
Web Map Services
Primary source: NHD 100K data in 222 subregions
Stream Selection and Generalization
Waterbody Selection and Generalization
100K
1M
Streamgages
Coastlines
Data Integration: Streams and Coasts
Data Integration: Streams and Roads
International Cooperation National Atlas of the United States®
U.S. Geological Survey Instituto Nacional de Estadística, Geografía e Informática
(INEGI) Natural Resources Canada Earth Sciences Sector Commission for Environmental Cooperation (Canada,
Mexico, US) IBWC- International Boundary and Water Commission
(Mexico-US) IBC- International Boundary Commission (Canada-US)
Canada-US Border
Mexico-US Border
Regional Hydrologic Network
Trace upstream based on gage data
Trace downstream based on gage data
Cartography
Map Maker
Ideas for New Base Map Series
Last set of small scale base maps was created 50 years ago. 1M hydro, transportation, populated places,
boundaries, terrain and land cover Regional GeoPDF maps National base map web services at multiple
scales Files and templates in production format (AI) Templates for future wall maps
Water Watch
Link Water Watch to 1M Gages
Drop of Water
Summary National Atlas 1:1,000,000-scale U.S. Hydrography Dataset Four national shapefiles, 21 regional geodatabases, a WMS
Streams Waterbodies Gages Coasts
Aligned with US transportation features, state and county coastal boundaries, and international borders
Aligned with hydrographic data in Canada and Mexico Cartographic and hydrologic uses Global, continental, and national uses Available in the near future at the National Atlas website :
www.nationalatlas.gov