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Federal
1:100,000-scale Digital Line Graphs (DLG) from the U.S. Geological Survey
National Aeronautics and Space Administration —
Digital line graph (DLG) data are digital representations of cartographic information. DLG's of map features are converted to digital form from maps and related... -
Federal
Permafrost Map of Alaska, USA, Version 1
National Aeronautics and Space Administration —
This data set consists of a geo-referenced digital map and attribute data derived from the publication 'Permafrost map of Alaska'. The map is presented at a scale of...