| rlf | ArcGIS Report Layout File |
| rlk | TNTmips Link File |
| rmap | CompeGPS Raster Map |
| rmp | Magellan eXplorist Raster Map |
| rnf | Carlson SurvCE Road Network Data |
| rou | Garmin MapSource Route Data |
| rrd | ArcGIS Reduced Resolution Dataset File |
| rrd | ERDAS Imagine RRD Data |
| rst | Idrisi Raster Format RAW Image |
| rtcm | RTKLIB RTCM Data |
| rte | OziExplorer Route Data |
| rtg | RiverTools Grid Data |
| rtkt | GeoVisu Downloaded Royaltek Tracklog |
| rtmap | CompeGPS TwoNav Overview Layer |
| rtx | Bike GPS RichTrack Data File |
| rtz | ECDIS Route Data |
| rtzp | ECDIS Route Package |
| rupi | Sygic POI Database |
| rus | GisRussa Map |
| rus | Navitel Navigator Map Data |
| rw5 | Survey Pro Data |
| rxm | GisRX GPS Navigator Map |
| rxo | RINEX Observation Data |
| sa4 | DeLorme Street Atlas USA Map Data |
| sa8 | DeLorme Street Atlas 8 Map Data |
| sbf | Septentrio Binary File |
| sbn | ArcGIS Spatial Index |
| sbn | GT-31 Binary SIRF Data |
| sbx | ArcGIS Spatial Index |
| scs | HERE Maps for Android SCS Map |
| sd | ArcGIS Service Definition Data |
| sddraft | ArcGIS Service Definition Draft Data |
| sdf | Autodesk Mapguide Spatial Data |
| sdi | ArcGIS Spatial and Attribute Index |
| sdlic | ArcGIS Data License |
