What it is Google Earth ? Google Earth is a virtual globe, map and geographical information program that was originally called EarthViewer 3D. It maps the Earth by the superimposition of images obtained from satellite imagery, aerial photography and GIS 3D globe.Google Earth displays satellite images of varying resolution of the Earth's surface, allowing users to see things like cities and houses looking perpendicularly down or at an oblique angle. Google Earth allows users to search for addresses for some countries, enter coordinates, or simply use the mouse to browse to a location. Many people use the applications to add their own data, making them available through various sources,