Because you work with different programs, ExpertGPS was designed to make it easy to exchange GPS data. ExpertGPS stores your GPS data in the popular GPS Exchange format, so you can open your GPS data files in dozens of other applications. ExpertGPS also reads and writes data files from Google Earth, Garmin's MapSource, National Geographic's Topo!, and MapTech's Terrain NavigatorS. Export your GPS data to Microsoft's Excel for further manipulation. GIS professionals can bring GPS data directly into ESRI's ArcView from ExpertGPS, along with calibrated topo maps and aerial photos.