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- Prodhomme, Marie3
- Ptolemy, Claudius1
- Radefeld, Carl Christian Franz, 1788-18749
- Rand McNally and Company1
- Rapkin, J.1
- Rawson, Peg2
- Real Estate Division/Department of Administrative Services4
- Rebecca Flores Miller1
- Rebesco, M. (Michele)2
- Reed, John Calvin, Jr. 1930-5
- Rennell, James, 1742-18302
- Republic Geodetic Authority (Serbia)13
- Resources Legacy Fund Foundation1
- Richardson, Andy1
- Richardson, William A., 1795-18561
- Ritchie, Andrew C.30
- Ritters, Kurt1
- Riverside County (Calif.). Geographic Information Services47
- Rizzi-Zannoni, Giovanni Antonio, 1736-18141
