Presented at the 2011 Texas GIS Forum

1. National Atlas of the United
States 1:1,000,000-scale
Hydrography Dataset
By
Florence Thompson
U.S. Geological Survey-Texas Water Science Center
U.S. Department of the Interior
U.S. Geological Survey

2. 2 million-scale to 1 million-scale

3. Why 1:1,000,000 scale?
Global North United
Map America States

4. Why Hydrography?

5. Waterbodies, Coastlines,
Streams, Streamgages

6. Four National Shapefiles

7. 21 Regional Networked
Geodatabases

8. Web Map Services

9. Primary source: NHD 100K data in
222 subregions

10. Stream Selection and Generalization

11. Waterbody Selection and
Generalization
100K
1M

12. Streamgages

13. Coastlines

14. Data Integration: Streams and
Coasts

15. Data Integration: Streams and Roads

16. 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)

17. Canada-US Border

18. Mexico-US Border

19. Regional Hydrologic Network

20. Trace upstream based on gage data

21. Trace downstream based on gage
data

22. Cartography

23. Map Maker

24. 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

25. Water Watch

26. Link Water Watch to 1M Gages

27. Drop of Water

28. 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