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You searched for: Creator United States Geological Survey (USGS) Remove constraint Creator: United States Geological Survey (USGS) Subject Imagery and Base Maps Remove constraint Subject: Imagery and Base Maps Type Dataset Remove constraint Type: Dataset Time Period 2005-2009 Remove constraint Time Period: 2005-2009
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1.
raster

Chesapeake Bay Watershed Land Cover Data Series 2006 penn-state

2006. United States Geological Survey (USGS). To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

2.
vector

Historic topographic maps for Pennsylvania penn-state

2005. United States Geological Survey (USGS). Historic USGS 15 minute topographic maps for Pennsylvania as collected from the MapTech Historical Map Collection at '. Scanned map images from Map...