They were then mosaicked and clipped to facilitate onscreen digitizing using GIS software. The present study is an attempt in this direction, in which 340 individual tiles of Google earth images covering Vellore in Tamilnadu were extracted using Elshayal Smart open source software. and hence can be best utilized for urban related applications. An alternative solution is to utilize Google earth imagery which is open source and provides clear view of buildings, roads, etc. To overcome this, one has to buy latest high resolution satellite image which is more expensive to purchase and sometimes it may not be possible to get the data due to security reasons. The images are of lower or medium resolution type and in many cases it may not be possible to obtain the latest image. The free satellite imagery provided in global landcover facility (GLCF) which can be used to prepare the landuse maps as attempted in many studies has certain limitations. ![]() ![]() The fundamental data required by urban planners and policy makers is accurate information on current landuse practices in a city or town and how it changes over the past for carrying out various urban planning and management activities.
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