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Ann Arbor Data Catalog (35)
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Athens Conservancy GIS Center (53)
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CMAP (Chicago Metropolitan Agency for Planning) Data Hub (51)
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Carroll County GIS Open Data (29)
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GEOhio Spatial Data Discovery Portal (314)
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GIS Data Downloads for Erie County, Ohio (6)
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ICPSR (Inter-university Consortium for Political and Social Research) (1)
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Illinois Geospatial Data Clearinghouse (173)
IndianaMap (358)
Iowa Geodata (136)
IowaDOT Open Data (546)
Kenosha County, WI GIS Open Data Portal (30)
Lake County Illinois Open Data Portal (53)
Land Records Data Portal of Columbia County, WI (61)
LandScan Global Population Database (23)
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Linn County, Iowa Open Data Portal (39)
Lorain County GIS Data (84)
Macoupin Data (2)
Maryland iMap (1,016)
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NebraskaMap (148)
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Pennsylvania Department of Conservation and Natural Resources Open Data Portal (57)
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Peoria County GIS Open Data Portal (70)
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Prince George's County Open Data Portal (13)
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Racine County GIS Download (41)
Ramsey County Open Data (36)
Renville County Open GIS Data (44)
Rutgers University-New Brunswick (13)
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Saint Louis County GIS & Mapping (18)
Sarpy County GIS Portal (106)
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St Mary's County GIS Downloadable Layers (25)
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Stanford (1,106)
Stark County GIS Data (108)
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Summit County GIS Data (31)
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The Newberry Library (53)
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UM Matthaei Botanical Gardens and Nichols Arboretum (30)
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Wood County Open Data Portal (13)
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York County, PA GIS Open Data Portal (50)
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