Remote sensing is a revolutionary change in surveying in which objects on the earth are sensed from remote places like aircrafts or satellites and are used in map making. It always goes with Geographical Information System (GIS) which is a software tool used for the analysis of remotely sensed data with the help of the computers.
In this chapter introduction is given to remote sensing and GIS. Application of remote sensing is explained.
9.1 Remote sensing
9.2 Geographical Information System (GIS)