Google Earth is a virtual Earth software developed by Google Inc. that arranges satellite photos, aerial photography and GIS on a 3D model of the Earth. Google Earth was launched to the world in 2005 and was named one of the 100 best new products in the world in 2005 by PC World Magazine. Google Earth is divided into a free version and a professional version, which allows users to view high-resolution satellite images from around the world for free.

The effective resolution of the global landscape images on Google Earth is at least 100m, and the eye alt is about 15km, but for big cities, famous scenic spots, and building areas will provide high-precision images with a resolution of about 1m and 0.5m, and the eye alt is about 500m and 350m respectively.

In Google Earth, you can further mark landmarks and record an unlimited number of trips. Just turn on the tour function, press the record button, and you can see the whole world. You can even add background music or voice-overs to make the journey more personal. Google Earth will replace the existing desktop search software.

In addition, the 3D map positioning technology adopted by Google Earth can push the latest satellite images on Google Map to a new level. Users can search for specific areas on the 3D map, zoom in and out on virtual images, and then form driving directions. In addition, Google Earth has crafted a special option, Bird's Eye View of the Journey. Google Earth does all of this primarily by accessing Keyhole's expanded database of aerospace and satellite images. The database was updated and it contains a large amount of terrain data from NASA, with more terrain to be covered in the future, involving fields, wastelands and more.