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Geographic Information Systems, or GIS for short, has gained prominence as remote sensing has become more prominent. It has expanded its reach to fields such as civil engineering, geoscience, forestry, disaster mitigation, ecology and the environment, and many more. The book presents GIS concepts in a straightforward manner. It covers topics like the development of GIS, data structures, database concepts, map projections, hardware and software requirements for implementing GIS, error detection and correction, and advanced analysis.