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1950-1999
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Datasets (2,240)
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Polygon data (188)
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Vector data (1,668)
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Baltimore County Open Data Portal (2)
CMAP (Chicago Metropolitan Agency for Planning) Data Hub (1)
Cornell (75)
Data Downloads - Montgomery Planning (4)
Delaware Valley Regional Planning Commission (DVRPC) (4)
Franklin County Auditor, Ohio Open Data (1)
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GeoDa Data and Lab (31)
Harvard (78)
Humanitarian Data Exchange (19)
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Minnesota Geospatial Commons (3)
Minnesota Legislative Coordinating Commission - Geospatial Information (LCC-GIS) (3)
Montgomery County Open Data (1,342)
Natural Resources Research Institute (54)
New Jersey Department of Environmental Protection's (NJDEP) Bureau of GIS (34)
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Open Data DC (48)
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OpenDataPhilly (1)
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Pennsylvania Spatial Data Access (PASDA) (91)
PolicyMap (1)
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Stanford (1)
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U.S. Fish and Wildlife Service Open Data (13)
UW Digital Collections Center (136)
UW-Madison Robinson Map Library (98)
University of Chicago Library GIS Data Hub (5)
University of Minnesota (15)
Wisconsin Geological and Natural History Survey (22)
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