Biophysical material and man-made features on the surface of Earth are inventories using remote sensing and in situ techniques.
The information is often stored cartographically or in a geographic information system (GIS). Some of the data are static, that is, they do not change over time. Conversely, some biophysical materials and man-made features are dynamic, changing rapidly.
It is important that such changes be inventoried accurately so that the physical and human process at work can be more fully understood (Estes, 1992; Jensen and Narumalani, 1992). Therefore, it is not surprising that significant effort has gone into the development of change detection methods using remotely sensed data. This chapter reviews how change information is extracted form digital remotely sensed data. It summarizes the remote sensor system change detection takes place. Many of the most widely used change detection algorithms are identified and demonstrated where possible using rural and urban examples. The general steps required to perform digital change detection using remotely sensed data.
One of the first requirements is to identify land-over classes of interest to be monitored and eventually placed in the change detection database. This requires the selection of an appropriate classification scheme.
This book will be of immense help to all those contemplating to acquire expert knowledge of tools for map analysis.
ABOUT THE AUTHOR Anil Jamwal
Er. Anil K. Jamwal holds Postgraduate qualification in Remote Sensing, Botany, Ecology & Environment. Presently he is the Principal Scientist at Geo-Informatics Institute of India, New Delhi offering M.Sc. Degree in Geo-Informatics under the aegis of Sikkim Manipal University of Health, Medical and Technological Sciences. He has guided more than 150 researchers for analyzing the satellite data with a view to executing programmes and projects related to forest development, river valley projects, hydroelectricity, rural and urban housing.
ABOUT THE AUTHOR Avinash Chiranjeev
Dr. Avinash Chiranjeev, M.S., Ph.D is the Head of the IT Division at the WIBP/IIEE International Network headquartered at New Delhi. He has been associated with the most important programmes of WIBP and IIEE related to computer assisted Non Formal and continuing Education Programme, Environmental Education Information Systems and Management, natural resources Database network besides organization and implementation of scientific and innovative researchers for the optimization of the available data.
ABOUT THE AUTHOR Azharul Haque
Mohd. Azharul Haque is a Scientist and National Counsellor at The Global Open University Nagaland. He has been the Chief of Training at Environmental Laboratory at the Indian Institute of Ecology an Environment New Delhi of conducting programmes related to pollution control including measurement of pH, condutivity, dissolved oxygen, BOD, COD, and other parameters. He has been participating in different congresses and conventions besides presenting his papers related to ecology, biochemistry, pollution, biotechnology.
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