GEV integrates with Google Earth (GE) and builds the cache file for a specific area needed by the user. If you want to scan a big area over GE with a detailed zoom (from only 600 meters altitude) but ypu don't want to move over the whole area with the mouse while GE will refresh every snapshot and save it in its cache for later offline view, GEV will help you. This program will take the details of the area you want to scan and the zooming value and it will fill the cache automatically.