| Abstract: | The projective methods of Helmert and Pizzetti enable the measured elements of a geodetic network to be reduced rigorously
to the surface of a reference ellipsoid. However, in most existing triangulation networks, the routine development method
has been used for this purpose.
Some of the differences between the development and projective methods are investigated by interpreting the results of two
numerical examples. It is concluded that use of the development method may cause appreciable discrepancies to occur within
geodetic networks, depending primarily upon the extent of the networks, the orientation of the ellipsoid used, and the magnitude
of the geoid undulations.
Geophysical Studies Section Aeronautical Chart and Information Center |
