FIG GUIDE FIG PUBLICATION NO 62 Ellipsoidally Referenced Surveying for Hydrography INTERNATIONAL FEDERATION OF SURVEYORS (FIG) Ellipsoidally Referenced Surveying for Hydrography Jerry Mills David Dodd INTERNATIONAL FEDERATION OF SURVEYORS (FIG) Copyright © The International Federation of Surveyors (FIG), May 2014. All rights reserved. International Federation of Surveyors (FIG) Kalvebod Brygge 31–33 DK-1780 Copenhagen V DENMARK Tel. + 45 38 86 10 81 E-mail:
[email protected] www.fig.net Published in English ISSN 1018-6530 (printed) ISSN 2311-8423 (pdf) ISBN 978-87-92853-09-7 (printed) ISBN 978-87-92853-16-5 (pdf) Published by International Federation of Surveyors (FIG) Cover images: David Dodd Layout: Lagarto Printer: 2014 Hakapaino, Helsinki, Finland CONTENTS LIST OF FIGURES ...................................................................................................................................vi ACRONYMS .............................................................................................................................................vii FOREWORD ...........................................................................................................................................viii PREFACE ....................................................................................................................................................ix 1 INTRODUCTION .............................................................................................................................1 2 VERTICAL POSITIONING ...........................................................................................................3