- Stanford20,902
- Princeton20,317
- University of Minnesota5,000
- Indiana University4,796
- UW-Madison Robinson Map Library4,511
- Columbia2,992
- University of Iowa2,557
- UW Digital Collections Center2,524
- Planning and Cadastral8,612
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- Transportation4,689
- Oceans4,027
- Imagery and Base Maps3,990
- Climatology, Meteorology and Atmosphere3,603
- Sea ice3,351
- Topographic maps3,212