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NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.

This study was sponsored by Award No. 02HQGR0114 between the National Academy of Sciences and the U.S. Geological Survey. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the view of the organizations or agencies that provided support for this project.

International Standard Book Number: 0-309-08747-3

Library of Congress Control Number: 2003104244

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Cover: Layers of geographic information represented as a blanket (upper layer) and quilt (lower layer) covering the conterminous United States. The study committee uses the blanket and quilt metaphor to distinguish components of the USGS National Map concept. SOURCE: Susanna Baumgart, University of California, Santa Barbara.

Cover designed by Van Nguyen

Copyright 2003 by the National Academy of Sciences. All rights reserved.

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