Modern GIS systems allow the collection of all such geospatial data in one place for a comprehensive analysis of the area under study. The arrival of Big Data set the stage for more advanced processing of EO datasets and garnering additional insights through machine learning, predictive modeling, and other cutting-edge applications. The convergence of GIS and Big Data was a matter of time and tech progress, as their union opens up immense opportunities for businesses and individuals alike. There are known applications in air pollution studies as well as agriculture, forestry, environment, disaster relief, intelligence, defense, and defense.