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.