Lists all EXIF GPS tag identifiers.
Values:
| IGMDTAG_ID_EXIF_GPS_VERSIONID | GPS version ID. |
| IGMDTAG_ID_EXIF_GPS_LATITUDEREF | GPS latitude ref. |
| IGMDTAG_ID_EXIF_GPS_LATITUDE | GPS latitude. |
| IGMDTAG_ID_EXIF_GPS_LONGITUDEREF | GPS longitude ref. |
| IGMDTAG_ID_EXIF_GPS_LONGITUDE | GPS longitude. |
| IGMDTAG_ID_EXIF_GPS_ALTITUDEREF | GPS altitude ref. |
| IGMDTAG_ID_EXIF_GPS_ALTITUDE | GPS altitude. |
| IGMDTAG_ID_EXIF_GPS_TIMESTAMP | GPS time stamp. |
| IGMDTAG_ID_EXIF_GPS_SATELLITES | GPS satellites. |
| IGMDTAG_ID_EXIF_GPS_STATUS | GPS status. |
| IGMDTAG_ID_EXIF_GPS_MEASUREMODE | GPS measure mode. |
| IGMDTAG_ID_EXIF_GPS_DOP | Measurement precision. |
| IGMDTAG_ID_EXIF_GPS_SPEEDREF | GPS speed ref. |
| IGMDTAG_ID_EXIF_GPS_SPEED | GPS speed. |
| IGMDTAG_ID_EXIF_GPS_TRACKREF | GPS track ref. |
| IGMDTAG_ID_EXIF_GPS_TRAK | GPS track. |
| IGMDTAG_ID_EXIF_GPS_TRACK | GPS track. |
| IGMDTAG_ID_EXIF_GPS_IMGDIRECTIONREF | GPS img direction ref. |
| IGMDTAG_ID_EXIF_GPS_IMGDIRECTION | GPS img direction. |
| IGMDTAG_ID_EXIF_GPS_MAPDATUM | GPS map datum. |
| IGMDTAG_ID_EXIF_GPS_DESTLATITUDEREF | GPS dest latitude ref. |
| IGMDTAG_ID_EXIF_GPS_DESTLATITUDE | GPS dest latitude. |
| IGMDTAG_ID_EXIF_GPS_DESTLONGITUDEREF | GPS dest longitude ref. |
| IGMDTAG_ID_EXIF_GPS_DESTLONGITUDE | GPS dest longitude. |
| IGMDTAG_ID_EXIF_GPS_DESTBEARINGREF | GPS dest bearing ref. |
| IGMDTAG_ID_EXIF_GPS_DESTBEARING | GPS dest bearing. |
| IGMDTAG_ID_EXIF_GPS_DESTDISTANCEREF | GPS dest distance ref. |
| IGMDTAG_ID_EXIF_GPS_DESTDISTANCE | GPS dest distance. |
| IGMDTAG_ID_EXIF_GPS_PROCESSINGMETHOD | GPS processing method. |
| IGMDTAG_ID_EXIF_GPS_AREAINFORMATION | GPS area information. |
| IGMDTAG_ID_EXIF_GPS_DATESTAMP | GPS date stamp. |
| IGMDTAG_ID_EXIF_GPS_DIFFERENTIAL | GPS differential. |