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Topographic maps, thematic maps, DEMs, DOQs, and other virtual maps

• GIS Data Depot
  Topos, DEMs, DOQ, hydrographic maps, transportation maps, public land survey maps, landuse and landcover maps, wetlands, and other maps for Oklahoma and OK counties. A product of geocommunity.com.
   
• Terraserver
  Topos, aerial and satellite photos, relief maps. Aerial and satellite photos aren't available for all areas. Can find locations by name; can also search by latitude or longitude. View aerial photographs of your local area. A product of Microsoft.
   
• Topozone
  Topozone has every U.S. Geological Survey map for the U.S. at 1:100,000, 1:25,000, and 1:24,000 scales.
   
• Geological Survey
  Information about the U.S. Geological Survey's national mapping program, including the National Atlas of the United States.
   
• NOAA Topographics
  Topographic maps for states from the National Oceanic and Atmospheric Administration's National Data Centers.
   
• Maps on Demand
  Environmental theme maps from the Environmental Protection Agency for U.S., state, and county.
   
• National Resources Inventory
  Land cover and land use maps from the National Resources Inventory program of the U.S. Department of Agriculture.
   
• Montana State Library
  Montana State Library's Natural Resource Information System. The best specific-state GIS in the nation, and the product of a library!
   
• Oklahoma Department of Transportation
  ODOT's own series of maps of Oklahoma counties.
   
• National Forest Maps Ordering
   
• Geological Survey Maps Ordering

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1990 Census Maps

• TIGER Mapping Service
  Create a map of Census Bureau data for population and social characteristics. Can map to county level. Notes: you need to fill in each variable in their search screen; the key to their map codes is in the "attribute data" files; expect to expend a little effort to learn this (it's worth it).

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Satellite Photos

• LANDSAT
  Landsat photo index from U.S. Geological Survey.
   
• Spatial News
  List of Landsat photos from Spatial News newsletter (note: more up to date than U.S.G.S. index).
   
• Terraserver Satellite Photos
  Satellite photos from Terraserver (note: satellite photos are identified as Spin 2 images, and are not available yet for many areas).

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GIS Data Sources

• Digital Terrain Data
  Digital Terrain Data from the National Oceanic and Atmospheric Administration provides digital elevation model data for the U.S. and the world.
   
• Image of Oklahoma
  From 30 Second Topographic Data (June 1999).
   
• U.S. Geospatial and Attribute Data
  Guide to Mostly On-Line and Mostly Free U.S. Geospatial and Attribute Data from The Center for Advanced Spatial Technologies. Links to data for the world, the U.S., state, and counties; and data by themes. An excellent source.

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GPS Information

• Matt Rosenberg
  Matt has gathered all the links to information about GPS that you'll ever need.
   
• Trimble Land Survey Products
  Online GPS tutorial.

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Geographic Names

• Geographic Names Database
  The Geographic Names Information System database of the U.S. Geological Survey. Use this for names in U.S.
   
• GEOnet Names Server
  GEOnet Names Server of the National Imagery and Mapping Agency. Use this for names in other nations.

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GIS Virtual Publications

• Federal Geographic Data Committee
  Includes press releases, factsheets, and newletters on all aspects of spatial data.
   
• Spatial News "White Papers."
  Virtual documents on all aspects of spatial data.
   
• Spatial News
  Virtual magazine.
   
• Directions Magazine
  Virtual magazine.
   
• Blue Marble News
  Virtual magazine.
  

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Miscellaneous

• Map Server Demos
  Miscellaneous map server demos from ESRI, including searching the EPA's Toxic Release Inventory System by zip code, making a shaded relief map of anyplace in the world, and viewing maps from the U.S. Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report.
   
• The Peters Projection: An Area Accurate Map
  The Arno Peters map of 1974 is the first map that plots miles equally from east to west and from north to south. It is the most accurate world map that we have.
   
• Geographic Information Systems FAQ

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Oklahoma Department of Libraries