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6. ACKNOWLEDGMENTS 
The innumerable contributions of colleagues at the 
University of Newcastle, including Mr M.H. Elfick, 
Prof. J.G. Fryer and Dr H.T. Kniest cannot go 
unthanked. Dr S. Robson of City University, London, 
made extensive contributions to programming. 
Financial support for the purchase of hardware was 
provided by the University of Newcastle. ADAM 
Technology of Perth, Western Australia, provided 
valuable material assistance and travel support to 
permit the writer to attend informative meetings and 
conferences. Early work on this project was 
facilitated by the writer's visit to the Department 
of Photogrammetry at the Royal Institute of 
Technology, Stockholm. 
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