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Monitoring the Physical Growth of Mandya City: Using GPS
 Dr. Ashok Hanjagi Associate Professor Dept. of Geography, Bangalore University, India Email: drashokhanjagi@yahoo.com Shivakumara Naiklal H S Student Bangalore University, India Email: shivakumarnaiklal@yahoo.co.in Prasad R. Garag Student Bangalore University, India Email: garagprasad@yahoo.com Karisidh B. Khot Student Bangalore University, India Email: karisidhkhot@yahoo.co.in Abstract : Mandya city is an administrative head quarter of Mandya District in Karnataka state. The city consists of 35 wards with an area of 1991.98 acres (according 1971 SOI map) and has a population of 131,179 according to 2001 Census Report. Mandya City is located in South Central part of Mandya district. It extends from 76° 31' to 76° 32' 0" East Longitude and 12° 31' to 12° 32' 0" North Latitude. Hebba Hall (Stream) flows towards northeast direction and forms its northeast boundary for the city. The city is well-connected with roads and railway lines and also urbanized with good infrastructure facilities. The main purposes of the research paper are to create boundaries, roads, railway lines of Mandya city with the help of GPS; to understand temporal expansion of the city during the study period i.e. from 1971 to 2005; to generate up-to-date information of the city’s physical growth. Mandya city’s roads, railway lines, drainage network and city boundaries are mapped using remote sensing IRS ID large scale satellite imagery. Toposheet by SOI is also used to map the city using GPS. ERDAS Image Processing Software is used to register, create layers and image classification for the city. The GPS Survey study reveals that the rate of physical expansion of the city was not the same in all the decades, it was fluctuating. Maximum increase can be seen in 2005 of three decades i.e. during 1971-1981, 1881-1991 and 1991-2005. The city is not expanding more mainly because it has well agricultural irrigated area around it. The city’s growth is also checked by Bangalore and Mysore cities directly are indirectly, which are located nearby to Mandya city. Hence, its physical expansion is restricted to only limited areas. Introduction The urban centers prolong on land and it is the land that puts up the major part of the entire environment. Any environmentally well-matched town planning must start up with a comprehensive look on the make use of land. Consequently, there is a great need of detailed data and information to planners about the extent, coverage and spatial distribution of diverse urban land uses, housing distinctiveness, growth patterns, population, urban sprawl, infrastructure availability, utilities, urban fringe, etc. The rapid and random expansions of cities are a typical phenomenon of urban landscape in India. The expansions of the cities within and beyond their limits are sadly remained a neglected area in urban research. There is no definite boundaries where urban area ends and rural area starts. The cities spread out within the jurisdictions of panchayats, which have neither financial resources nor technical expertise to plan and solve the problems of growing cities out of their limit. The urban authorities also ignore to manage the rapidly developing urban areas. Cities growths are not planned, monitored and mapped correctly using recent techniques. Hence, there is need to map all the cities systematically to detect changes that have occurred within and around built-up areas.
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