Abstract
Digital Elevation Models (DEMs) play a crucial role in watershed modelling and hydrological analysis. In recent years, the availability of high-resolution satellite imagery and remote sensing data has made it easier to generate DEMs using different software and platforms. Google Earth Pro (GEP) is one such platform that offers a user-friendly interface for generating DEMs, making it a popular choice among researchers and practitioners. However, the accuracy and reliability of the DEMs generated by GEP in different regions and under different environmental conditions have not been fully investigated. The increasing development activities change the earth’s topography, which in turn makes it necessary more frequent production of DEM. As it is a costlier task urban areas are given priority. This article focuses on a new methodology for generating DEM from GEP for a small area in the Ernakulam District of Kerala State, India. DEM prepared from GEP is then compared with different DEMs like SRTM 30m, ALOS PALSAR 12.5m and Cartosat 10m as well as ground surveyed values. It is observed that DEM prepared from GEP is as precise as other freely available DEMs as well as Cartosat 10m. Hence this DEM can be used for planning micro level developmental activities for smaller areas.
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