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 report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine.

Support for this study by the Mapping Science Committee was provided by the Defense Mapping Agency, the United States Geological Survey, the Bureau of Land Management, and the Bureau of the Census.

B-499

COVER: An early North American partnership—an etching of the marriage of Pocahontas and John Rolfe at Jamestown, Virginia, April 5, 1614. SOURCE: Library, Richmond (VA) Newspapers, Inc.