Remote sensing developed since 1960s is one of the most popular space-based Earth Observation techniques. After over 50 years’development, remote sensing has been a main method for spatial information acquiration and widely used in geology and relative fields. With the improvement in resolution and the intergrated system of space-aerial-ground based remote sensing comeing into being, remote sensing is not only used in traditional fileds, but developes into common service filed of our society. All these chan...