| qu4 | QuoVadis Database |
| qv5db | QuoVadis v5 Database |
| qvr | LP360 LAS Pyramiding Data |
| rd5 | Survey Pro Road Alignment Data |
| rdc | Idrisi Raster Format Description |
| rde | ArcGIS Reduced Resolution Dataset External File |
| rdf | ArcGIS Report Document |
| ref | Idrisi Raster Format Geographical Reference |
| rik | SharpMap Map Data |
| rik | Swedish Grid Map |
| 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 |
| rt2 | OziExplorer CE Route Data |
| rtcm | RTKLIB RTCM Data |
| rte | Navigon Mobile Navigator Route 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 |
