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Ancillary Data Application in a Digital Environment: A case study of Bangalore - Mysore corridor with a special emphasis on Bangalore Cosmopolitan Hub  M.R.Vijaindra Research Scientist, NRDMS Centre, Dept. of remote Sensing, Birla Institute of Technology Mesra, Ranchi e-mail: mrvijaindra@yahoo.co.in  Dr. M.S.Nathawat Professor and Head, Dept. of Remote Sensing, Birla Institute of Technology Mesra, Ranchi. e-mail:msnathawat@bitmesra.ac.in  Dr.Sudha Ravindranath Scientist’D’ Regional Remote Sensing Service Center, ISRO, Bangalore e-mail:raviatri@hotmail.com
Introduction
Throughout human history, cities have played an important role in transforming the society. They have been the scene and setting of major social, economic, and political change. The sample survey of 2001 states that the approximate urban population of our subcontinent covers 33.3% of its total geographical area. If one observes the urban fringe area it is possible to see Landuse and Landcover change. More and more rural area is getting engulfed in to the outstretched arms of urban fringe. This is causing a drastic land transformation, which is a dominant phenomenon in India. The class-1 cities are expanding rampantly crossing all borders, which is giving rise to many types of extremities in the common man’s life. Due to this if there is good communication network then; there are problems of air and water pollution and rising cost of living. The theme being dealt here is to find out the causes and consequences of the urban growth between the two cities and the changes in the surrounding environment. Also to suggest methods to solve some of the problems caused by the urban growth using ancillary data. Study Area Details The study region lies between the city of Bangalore and Mysore the highway road leading from Bangalore to Mysore is taken in to consideration. 10 kilometers buffer on either side of the road has been taken for this purpose; the buffer includes parts of the Bangalore urban, Bangalore rural, Mandya and Mysore districts. The reason this particular region has been selected is that the availability of digital data and due to the rapid urbanization which is taking place in this region. The study area is covering an area of 4584.15square kilometer area. Located in southern Karnataka. The coordinates between which the study region lies are given below.
The extraction of the buffer area is based on the highway road running between the two of the major cities of the state Bangalore and Mysore. Two paths of road have been selected to know the density of the traffic flow and its repercussion on the adjacent social environment. The urban database has been created for the 13 major towns and cities falling within the buffer region. Objectives
The spatial data used for the project are that of topographical maps published by the Survey of India. The region was surveyed in the year 1970-71 and printed in 1973.The scale of the topographical maps are 1:50,000. Ten toposheets cover the study area. The Non-Spatial data has been used to fix parameters for the Megalopolis and observe the various changes occurring in all the three working sectors primary, secondary and tertiary and try to evaluate the causes for such change. The secondary data used for this purpose are as follows:
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