Should Our Concept of Geodetic Datum Change with the Introduction of GPS?

des Instituts für Geodäsie

Heft 20-2/1985

Should Our Concept of Geodetic Datum Change with the Introduction of GPS?

Haim B. PAPO
Technion, Isarel Institut of Technology, Haifa / Israel

University of Tel Aviv / Israel


In: WELSCH, Walter M. / LAPINE, Lewis A. (Hrsg.) [1985]:
International Federation of Surveyors - FIG -
Proceedings Inertial, Doppler and GPS Measurements for National and Engineering Surveys
Joint Meeting of Study Groups 5B and 5C, July 1-3, 1985

Schriftenreihe Universitärer Studiengang Vermessungswesen, Universität der Bundeswehr München, Heft 20-2, Neubiberg, S. 475-485.


The dramatic changes in geodetic practice brought up with the implementation of GPS may call for a change in our understanding and definition of the geodetic datum. Without implying any doubts as to the consistency in space and in time of the GPS datum, a cautious and stepwise approach is recommended. The contribution of GPS measurements is partitioned into a "datum-definition" component and into a datumless "differential" component. In densification of geodetic control only the datumless component is to be employed. In the establishment of a primary geodetic network both parts can be used. However, the datum-definition component serves mainly as a data source for determining the ever-changing relationship between the GPS datum and the datum of the geodetic network.

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