In India, like the other countries of the world, air-borne and space-borne remote sensing techniques is being used in the research, planning and development. This book deals with the basic principles of remote sensing such as definition and types of remote sensing, electromagnetic radiation and its interaction with matter, types of sensors and platforms, data products and visual and digital analysis and interpretation techniques. The applications of remote sensing in the appraisal and management of natural resources, temporal change detection in various terrain features and environmental problems.