Geodetic Control Without Triangulation, Trilateration, or Gravity Data and Gravimetric Reduction of Levelling

摘要

The report presents programs in accomplishing the following: To develop a method that establishes geodetic control within a limited area from astronomic observations by removing the deflections of the vertical directly obtained from torsion balance measurements at the station; and to develop a reduction method best suited for the United States which would substitute the presently used method based on the normal gravity field.