The book has been divided into six chapters. The first chapter "Introduction to remote sensing" in this chapter we have given basics knowledge of remote sensing, it include the definition, history of the satellite systems, electromagnetic spectrum and resolutions etc. The second chapter of "Aerial Remote Sensing" deals with elements, interpretation, types of photo and measurements. The third chapter represents the "Satellite remote sensing". The fourth chapter analysed "Global Positioning System", it include the GPS procedure, types and developments. The fifth chapter is "Introduction to Geographical Information System" and covered basics information about GIS. The sixth chapter included applications of remote sensing, geographical information system and Global positioning systems. This book is very useful to bachelor, post graduates' degree of geography and research scholars can get the some ideas and knowledge about the Geospatial Technologies. This book is prepared with very basic and common information. Geographic knowledge of these technologies will provide students with the skills needed to meet the demands of their diverse careers in the global workplace.

The present book is an attempt to bring all theories of geography in one book for easy reading of teachers and students. Many divisions in geography has many theories. Readers should take effort to collect the theories from all books. All divisions has certain theories. There are so many theories in physical geography as well as human geography. A simple idea makes it convenient to read the theories in one book. First, we selected the certain theories as follows: Theory of continental drift, The theory of Isostasy, Von Thunens location theory, Crop combination method, The central place theory, Internal structure of city, The rank size rule, The social area analysis method, Losch's theory of economics of location, Walter Isard's theory, Alfred Weber's theory of least cost location, Demographic transition theory, Malthusian Theory of population- Criticism and applicability and Growth pole theory. Like this, there are 14 theories collected and compiled in this book as first volume. The theories collected from both physical geography and human geography. These theories are very important for those who are preparing for UPSC, should go through the theories.