GIS Links: Geospatial Data

Note that downloaded spatial data comes in many different forms and may require extraction or conversion with a special utility before you can use it in a map.

Click here for information on converting vector ArcInfo interchange files with the file extension e00 to coverage format which will be recognized by ArcGIS, ArcView, Arc Explorer, and other GIS software.

Jump to... State & Local ~ Commercial ~ US Gov't ~ Canadian Gov't ~ Academic... geospatial data sources.

State & Local Data Sources ~ back to top

Maine Office of GIS. http://megis.maine.gov/

Massachusetts GIS. In addition to comprehensive data for the State of Massachusetts, this site includes several data sets which are useful for other New England GIS users, including images of NOAA nautical charts and political boundary layers for all New England towns and the Atlantic Provinces. http://www.state.ma.us/mgis/massgis.htm

Vermont Center for Geographic Information. http://www.vcgi.org/

New Hampshire GRANIT. The New Hampshire Geographically Referenced Analysis and Information Transfer System (NH GRANIT) is a cooperative project to create, maintain, and make available a statewide geographic data base serving the information needs of state, regional, and local decision-makers. http://www.granit.sr.unh.edu/cgi-bin/load_file?PATH=//home.html

Eastern Maine Development Corporation offers economic development and landuse planning data and assistance to Eastern Maine businesses and municipalities. http://www.emdc.org/

Commercial Data Sources ~ back to top

GeoCommunity. Broad selection of GIS data for free or small fee. http://www.geocomm.com/

Geography Network. http://www.geographynetwork.com/

U.S. Government Data Sources ~ back to top

U.S. National Atlas. http://www.nationalatlas.gov/pros.html Downloadable map layers for the entire U.S. in these categories: Agriculture, Environment, People, Biology, Geology, Transportation, Boundaries, History, Water, Climate, Map Reference.

U.S. Geological Survey (USGS)

National Mapping Information. http://nationalmap.gov/

National Elevation Dataset. Image or grid data for the US and the globe. http://seamless.usgs.gov/

U.S. Census
TIGER files (Topologically Integrated Geographic Encoding and Referencing) http://www.census.gov/geo/www/tiger/index.html
U.S. National Oceanic & Atmospheric Administration (NOAA)

Office of Coast Survey, use the index pull-down at left to choose maritime boundaries, vector shorelines, etc. http://www.nauticalcharts.noaa.gov/

National Geospatial Data Center's Bathymetry and Topography Page http://www.ngdc.noaa.gov/mgg/bathymetry/relief.html

NOAA Coast Watch Product Search Page offers access to multiple sources of remotely sensed datasets. http://coastwatch.noaa.gov/interface/interface.html

National Environmental Satellite Data and Information Service. http://www.nesdis.noaa.gov/

Space Physics Interactive Data Resource. http://spidr.ngdc.noaa.gov/spidr/index.html

Defense Meteorological Satellite Program offers maps of land cover and lights on Earth at night, including fires, city lights, etc. http://dmsp.ngdc.noaa.gov/dmsp.html

National Aeronautics & Space Administration (NASA)

NASA's Ocean Color portal for remote sensing data, including MODIS and SeaWIFS, offers a data access section and links to many datasets and useful information. http://oceancolor.gsfc.nasa.gov/

MODIS Sattelite information. http://modis.gsfc.nasa.gov/

SeaWIFS Satellite information and data dccess http://oceancolor.gsfc.nasa.gov/SeaWiFS/

Earth Observatory site for free access to satellite imagery. http://earthobservatory.nasa.gov/

Canadian Government Data Source ~ back to top

Canada GeoGratis. http://geogratis.cgdi.gc.ca/
Academic Data Sources ~ back to top

Stanford University Library GIS Data Bookmarks. A comprehensive list of links to GIS data worldwide. http://www-sul.stanford.edu/depts/gis/bookmark.htm

Guide to Mostly On-Line and Mostly Free U.S. Geospatial and Attribute Data. This site may be overwhelming at first, but it has lots of data sources that you might not be able to find otherwise. Perhaps most useful are the links to lots of different sources of ATTRIBUTE DATA! Prepared by Stephan Pollard at the University of Arkansas, this site is often updated. http://libinfo.uark.edu/GIS/us.asp

International Ocean Color Coordinating Group offers links to many ocean color datasets http://www.ioccg.org/data_ioccg.htm

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