- Indiana University15,478
- Humanitarian Data Exchange10,048
- Center for Ancient Middle Eastern Landscapes, Institute for the Study of Ancient Cultures, University of Chicago8,792
- UW-Madison Robinson Map Library6,592
- University of Minnesota5,995
- Rutgers University-New Brunswick4,554
- Pennsylvania State University3,888
- University of Iowa3,595
- Minnesota Geospatial Information Office (MnGeo)3,406
- U.S. Fish and Wildlife Service Open Data2,613
- UW Digital Collections Center2,596
- University of Illinois Urbana-Champaign2,501
- Michiganology2,466
- WisconsinView2,243
- Montgomery County Open Data1,794
- Open Data DC1,466
- Pennsylvania Spatial Data Access (PASDA)1,395
- Maryland iMap1,246
- Michigan State University1,226
- University of Michigan1,140
