2002. United States. Forest Service and Geological Survey (U.S.). This raster layer portrays general forest cover types for the United States in GeoTIFF format. Data were derived from Advanced Very High Resolution... National Atlas of the United States.
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2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.
1910. United States. Forest Service. Relief shown by contours, hachures and spot heights. on sheets 51 x 81 centimeters or smaller Scale approximately 1:570,240 General Map Collection. Forest Service (Washington D.C).
1929. United States. Forest Service. Relief shown by hachures and spot heights.; Greenwich prime meridian.; "Printed by the U.S. Geological Survey."; Inset: northwest continuation of m... The Service (Washington, D.C).