GTrek-IV displays individual or collective digital images in many formats such as CR2 (Canon), NEF (Nikon) & JPG or BMP among others. Image information is displayed including Date/Time and camera settings. GeoTagged data is also displayed as text coordinates and graphically on 3D representations of photo images of the ground through Google Earth. Displayed images can be GeoTagged manually through simple commands or automatically through GPS data derived from a GTrek GPS Datalogger or through GPS files created by other GPS devices.