Federal Agencies
National Soil Survey Center
Home: http://www.statlab.iastate.edu/soils/nssc/
Data: http://www.statlab.iastate.edu/soils/nsdaf/
U.S. Geological Survey
Home: http://www.usgs.gov
GIS Data: http://mapping.usgs.gov
U.S. Census Bureau
Home: http://www.census.gov
Data: http://www.census.gov/geo/www/tiger/index.html
U.S. Army Corps of Engineers
Home: http://www.usace.army.mil
U.S. Environmental Protection Agency
Home: http://www.epa.gov
National Oceanic and Atmospheric Administration
Home: http://www.noaa.gov
State Agencies
Michigan Department of Natural Resources
Home: http://www.midnr.com
Data: http://www.dnr.state.mi.us/SubIndex.asp?LinkID=500&sec=main&imageid=4
Michigan Information Center
Home: http://www.state.mi.us/dmb/mic/
Michigan Department of Environmental Quality
Home: http://www.deq.state.mi.us
Michigan Department of Transportation
Home: http://www.mdot.state.mi.us
Regional Agencies
Great Lakes Information Network
Home: http://www.glin.net
Data: http://www.glin.net/gis/
Regional Earth Science Applications Center
Home: http://resac.msu.edu
Great Lakes Environmental Research Laboratory
Home: http://www.glerl.noaa.gov
