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2013. Geological Survey (U.S.). This raster layer is a100-meter resolution land and water mask in (GeoTIFF format) of the conterminous Alaska, with separate values for oceans and ... National Atlas of the United States.
2001. National Atlas of the United States. The Bathymetric Shaded Relief of North America map layer shows depth ranges using colors, with relief enhanced by shading. The image was derived fr... National Atlas of the United States.
2001. National Atlas of the United States. The Bathymetry of North America map layer shows depth ranges using colors. The image was derived from the National Geophysical Data Center's ETOPO2... National Atlas of the United States.