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» Color Lanform Atlas: Oregon 
Ocean Remote Sensing Group within the Johns Hopkins University. Maps include: relief map, county map, false color satellite images (AVHRR), historical 1895 map.
http://fermi.jhuapl.edu/states/or_0.html
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» Oregon State University 
Map Room at The Valley Library.
http://osulibrary.orst.edu/research/guides/maps/maproom.htm
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» Oregon Trail Overview Map 
According to the official government survey, the main trunk of the Oregon Trail stretches 1930 miles from Independence, Missouri, to Oregon City, Oregon.
http://endoftheoregontrail.org/maplibrary/oregontrail.html
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» The Oregon History Project 
Links to maps, photographs, and periodicals.
http://www.ohs.org/education/oregonhistory/historical_records/index.cfm
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