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Published in Spring 2006
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Three countries add watershed information to atlas
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Click on map to view PDF (11 Mb)
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An important new layer of information, watershed boundaries, has been added to the first comprehensive and online digital map of North America.
In 2004, the CEC and its partners developed the first map of North America to be drawn by all three North American countries—the first living map of our continent to be available online and updated as new information is available. Institutions and individuals can freely use the map to advance scientific research, environmental promotion and any number of applications.
The atlas partners—the CEC, Atlas of Canada, Mexico’s Instituto Nacional de Estadística, Geografía e Informática, and the National Atlas of the United States—have now added the features defining the hydrological basins, or watersheds, to that atlas.
The Watersheds map features the six great basins that drain into the Atlantic, Arctic, and Pacific Oceans, as well as Hudson Bay, the Gulf of Mexico and the Caribbean Sea. Each is shown in its own color, with 17 major river basins shown in tonal variations. At the most detailed level the map presents hundreds of individual watersheds. Areas of internal drainage, with no outlets to the sea, are shown in gray.
Both the Watersheds map and the North American Atlas are set at a 1:10,000,000 scale. The watershed data join the previous data layers: including roads, railroads, populated places, political boundaries, hydrology, bathymetry, and sea ice.
The North American Atlas is available online at
www.cec.org/naatlas.>
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