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- Richardson, Andy1
- Ritters, Kurt1
- Rosenberg, Lewis I.1
- Rouet, Paul1
- Rumsey, David, 1944-1
- Russell, John, fl. 1733-17951
- Saint Vincent and the Grenadines. Lands and Surveys Department1
- San Francisco Estuary Invasive Spartina Project1
- San Joaquin County (Calif.). Community Development Department1
- San Joaquin County (Calif.).Community Development Department1
- Santa Clara County (Calif.). Planning Office1
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- Serbia. National Agency for Cadastre and Land Registration1
- Serpa, Paulo1
- South Africa. National Geo-spatial Information1
- Stabilimento di Giuseppe Civelli1
- Stanford University. Woods Institute for the Environment1
- Starling, Thomas1
- Stieler, Adolf1
