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