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http://www.ngdc.noaa.gov/ngdc.html
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geodata.gov is a web-based portal for one-stop access to maps, data and other geospatial services that will simplify the ability of all levels of government and ...
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Manages environmental data in the fields of marine geology and geophysics, paleoclimatology, solar-terrestrial physics, solid earth geophysics, and glaciology (snow and ice).
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Official site of the USGS.
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The GIS Data Depot provides FREE GIS data downloads and creates custom GIS data CD-ROMs for CAD, mapping, and location based applications.
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free
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Global community of data providers committed to making geographic content available and easy to publish online. Offers maps, satellite images, and demographic data.
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In this section of the website you will find maps of environmental variables. ... You can select a category to explore by following one of the links below: ...
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Interactive topographic map from the USGS that reveals the U.S.'s geology, hydrology, land use, natural ... URL: http://nationalmap.gov/index.html. Page ...
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No information avaiable
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The GEO Data Portal online database holds more than 450 different variables, as national, subregional, regional and global statistics or as geospatial data sets ...
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Coordinates the development of the National Spatial Data Infrastructure (NSDI) ... URL:http://www.fgdc.gov/index_html. Last modified on December 15, 2008 15:58 ...
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