selective salvation of Zeiss Ni 1 levelings
By: by Robert O. Castle and Thomas D. Gilmore.
Contributors: Gilmore, Thomas D.; Geological Survey (U.S.)
Series: Open-file report -- 94-698.; U.S. Geological Survey open-file report -- 94-698.
Publisher: U.S. Geological Survey
Published: 1994
Place of publication: Menlo Park, Calif
Language: eng
Number of pages: 30
Subjects: Geodesy -- United States; Leveling -- United States
Description: An analysis of the results of a representative sample of earlier Zeiss Ni 1 levelings suggests that a number of these earlier levelings were free of any significant magnetic error.
Notes: Cover title.

"USGS-OFR-94-698"

Includes bibliographical references (p. 13-14).