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Terrain models have always appealed to military personnel, planners, landscape architects, civil engineers, as well as other experts in various earth sciences. Originally, terrain models were physical models, made of rubber, plastic, clay, sand, etc. Since the later 1950s, the computer has been introduced into this area and the modeling of terrain surface has since then been carried out numerically or digitally, leading to the current discipline— digital terrain modeling. | DIGITAL TERRAIN MODELING Principles and Methodology Dr. Zhilin Li Professor in Geo-Informatics Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic University Dr. Qing Zhu Professor in GIS State Key Laboratory for Information Engineering in Surveying Mapping and Remote Sensing LIESMARS Wuhan University Dr. Christopher Gold Professor EU Marie-Curie Chair School of Computing University of Glamorgan CRC PRESS Boca Raton London New York Washington D.C. 2005 by CRC Press Library of Congress Cataloging-in-Publication Data Li Zhilin 1960- Digital terrain modeling principles and methodology Zhilin Li Qing Zhu and Chris Gold. p. cm. Includes bibliographical references and index. ISBN 0-415-32462-9 1. Digital mapping-Methodology. I. Zhu Qing 1966- II. Gold Chris 1944- III. Title. GA139.L5 2004 526-dc22 2004054578 This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. Neither this book nor any part may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying microfilming and recording or by any information storage or retrieval system without prior permission in writing from the publisher. The consent of CRC Press does not extend to copying for general distribution for promotion for creating new works or for resale. Specific permission must be obtained in writing from CRC Press for such copying. Direct all inquiries to CRC Press 2000 N.W. Corporate Blvd. Boca Raton Florida 33431. Trademark Notice Product or corporate names may be trademarks or registered trademarks and are used only for identification and explanation without intent to infringe. Visit the CRC Press