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Time Period:
1950-1999
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Aerial photographs (536)
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Baltimore County Open Data Portal (2)
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Center for Ancient Middle Eastern Landscapes, Institute for the Study of Ancient Cultures, University of Chicago (2,950)
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GeoDa Data and Lab (31)
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Harvard (78)
Hoosier Resilience Index: Indiana (2)
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Minnesota Geospatial Commons (5)
Minnesota Geospatial Information Office (MnGeo) (263)
Minnesota Legislative Coordinating Commission - Geospatial Information (LCC-GIS) (3)
Montgomery County Open Data (1,342)
Natural Resources Research Institute (54)
NebraskaMap (2)
New Jersey Department of Environmental Protection's (NJDEP) Bureau of GIS (34)
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Northwestern University (17)
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State of Michigan Open Data Portal (2)
The Ohio State University (212)
U.S. Fish and Wildlife Service Open Data (25)
UM Matthaei Botanical Gardens and Nichols Arboretum (23)
UW Digital Collections Center (136)
UW-Madison Robinson Map Library (98)
University of Chicago (1)
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University of Illinois Urbana-Champaign (212)
University of Iowa (591)
University of Maryland (5)
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