situation. 
ACKNOWLEDGEMENT 
The authors acknowledge their grateful thanks to Dr.Satish 
Dhawan, Chairman, Indian Space Research Organisation, and Secre- 
tary, Department of Space, Government of India, for generously 
sponsoring and funding this research and development effort. The 
authors wish to acknowledge the cooperation and help extended by 
Lt.Col.LRA Narayan, Head,Applications Division, N:SA, and the air 
survey unit during the planning and execution of the aerial sur- 
vey. ‘The enthusiastic help rendered by various colleagues, too 
numerous to be individually thanked, during different phase of the 
project is also gratefully acknowledged. The computer software 
programmes were developed by S.Natarajan, N.G.Inamdar, T.Ch.Malles- 
wara Rao and Surendra Kumar.  Bhaskar Rao and associates provided 
support in the photographic laboratory. Gunavathi typed the neat 
manuscript while cartographic services were provided by Dasgupta, 
Devindar and Sambasiva Rao. : 
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