| 2. Census Maps
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| U.S. census statistics and maps. |
| http://www.census.gov/datamap/www |
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| 3. Citimaps
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| Printable .pdf maps of Baltimore, Brooklyn, Liberty State Park, Long Island, Manhattan, Newport, and Philadelphia. |
| http://www.citimaps.com |
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| 5. County Map Project
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| Life-long record of a geographer's travels in the United States, mapped at the county level. Includes information about each state. |
| http://webhost.bridgew.edu/jhayesboh/COUNTIES/COUNTY.HTM |
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| 6. CountyMapsUSA.com
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| Contains maps of several states broken down to county level, with major towns and cities shown. |
| http://www.countymapsusa.com |
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| 7. Digital Atlas of the United States
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| Continuing public education project of Professor William Bowen and the Department of Geography at California State University, Northridge. |
| http://130.166.124.2/USpage1.html |
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| 9. Envirofacts Maps
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| A service provided by the U.S. Environmental Protection Agency for displaying environmental information for the entire United States. |
| http://oaspub.epa.gov/enviro/ef_home2.maps |
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| 10. ERsys.com
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| Demographic, lifestyle, and economic data covering over 1300 US cities portrayed as thematic maps, informative reports, detailed tables and colorful charts. |
| http://www.ersys.com |
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