| cdem | CompeGPS Digital Elevation Model |
| cgmap | CityGuide Map |
| cmf2 | CarryMap Apps Map Data |
| cor | Trimble Corrected SSF |
| cpg | ArcGIS Codepage |
| ctl | AGPS-Shape Pro Control Points Data |
| d11 | HERE Maps for Android Data |
| d12 | HERE Maps for Android Data |
| dcw | Digital Chart of the World Data |
| dpn | Depiction Data |
| dra | Map Maker Drawing |
| dth | SOCET SET Grid Terrain File |
| dup | SkyView User Waypoints File |
| dzg | RADAN GPS Data |
| e00 | ArcInfo ASCII Export |
| e01 | ArcInfo ASCII Export |
| e02 | ArcInfo ASCII Export |
| e03 | ArcInfo ASCII Export |
| e04 | ArcInfo ASCII Export |
| e05 | ArcInfo ASCII Export |
| eaz | ArcGIS Explorer Add-in |
| ecrg | Enhanced Compressed ARC Raster Graphics |
| ecw | Enhanced Compression Wavelet |
| emh | NaviPac Data |
| emt | GeoVisu Downloaded Emtac Trine Data |
| ers | ERDAS ER Mapper Image Header |
| ert | MGL Avionics Enigma Route File |
| erv | ERDAS ER Mapper Header Data |
| evf | ENVI Vector Data |
| ewm | EWView DOS Map |
| ewt | EWView DOS Track Data |
| eww | ER Mapper World Data |
| fbg | AGPS-Shape Pro Ground Surface |
| fbn | ArcGIS RO Spatial Index |
| fbx | ArcGIS RO Spatial Index |