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Time Period:
1950-1999
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Aerial photographs (536)
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Baltimore County Open Data Portal (5)
CMAP (Chicago Metropolitan Agency for Planning) Data Hub (1)
Carver County GIS Data (1)
Center for Ancient Middle Eastern Landscapes, Institute for the Study of Ancient Cultures, University of Chicago (2,950)
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Cornell (75)
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Delaware Valley Regional Planning Commission (DVRPC) (4)
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GeoDa Data and Lab (31)
Harford County Planning and Zoning Open GIS (9)
Harvard (78)
Hoosier Resilience Index: Indiana (2)
Humanitarian Data Exchange (19)
Indiana University (231)
IndianaMap (13)
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Maryland iMap (30)
Michigan State University (104)
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Milwaukee County GIS Download (11)
Minnesota Geospatial Commons (5)
Minnesota Geospatial Information Office (MnGeo) (263)
Minnesota Legislative Coordinating Commission - Geospatial Information (LCC-GIS) (3)
Montgomery County Open Data (1,353)
Natural Resources Research Institute (54)
NebraskaMap (2)
New Jersey Department of Environmental Protection's (NJDEP) Bureau of GIS (34)
New Jersey Geographic Information Network (NJGIN) Open Data Portal (2)
Northwestern University (17)
Oakland County, MI Open data (4)
Omaha/Douglas County GIS Open Data Portal (3)
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OpenDataPhilly (1)
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Pennsylvania Spatial Data Access (PASDA) (98)
Pennsylvania State University (314)
PolicyMap (2)
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Rutgers University-New Brunswick (1,418)
Sarpy County GIS Portal (3)
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Social Explorer (77)
Stanford (1)
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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 (22)
UW Digital Collections Center (136)
UW-Madison Robinson Map Library (98)
University of Chicago (1)
University of Chicago Library GIS Data Hub (5)
University of Illinois Urbana-Champaign (212)
University of Iowa (591)
University of Maryland (5)
University of Michigan (19)
University of Minnesota (1,278)
University of Nebraska-Lincoln (41)
Waukesha County GIS Download (6)
Wisconsin Geological and Natural History Survey (22)
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