Forest Survey of India (FSI) was created in June, 1981 with the objective of monitoring periodically (10 years cycle) the changing situation of land and forest resources and present the data for national planning; conservation and management of environmental preservation and implementation of social forestry projects. After a critical review of its activities, FSI was re-organised w.e.f. 1.7.1986. The main objective of FSI is now to prepare a comprehensive State of Forest Report (SFR) including National Forest Vegetation Map (NVM) once in every two years. It will also prepare thematic maps through use of remote sensing data with minimum essential ground truth verification on a 10 years cycle.