Affiliation: | 1. International Institute for Aerial Survey and Earth Sciences, I.T.C., P.O.B. 6, Enschede The Netherlands;2. Indian Institute of Remote Sensing, P.O.B. 135, Dehra Dun, U.P. India;3. Fysisch Geografisch en Bodemkundig Laboratorium, Universiteit van Amsterdam, Dapperstraat 115, 1093 BS Amsterdam The Netherlands |