Data collection
Data obtained was divided into satellite data and ancillary data. Ancillary information acquired through ground truth data of the land cover classes, topographic maps. Census data is also attributed to the respective locations of classes to make various analysis of social significance. The ground control points were in the form of reference data points gathered using Global Position System (GPS), applied for image classification and overall accuracy assessment of the image classification results. Satellite data for the 40 years consisted of multi-spectral data developed from Landsat satellite mission data provide by USGS glovis. The specifications of MSS, TM, ETM, OLI and Sentinel-2 are given in Table 1. All the sensors have different characteristic in terms of spectral, spatial, temporal and radiometric resolution.