Geophysics

   

Systèmes de Référence, Systèmes Projectifs

Authors: Henri Marcel Dufour, Abdelmajid Ben Hadj Salem

Many geodetic works currently exist on the surface of the globe, which have developed through regional networks, usually each having a fundamental point, where the astronomical data (\phi= latitude,\lambda=longitude,Az=azimuth) of a reference are confused with the counterparts geodetic data. The comparison of 2 networks, and, step by step, of all the connectable networks, can be done by the analysis of the coordinates of their common points. To this end, we can use 3 types of coordinates: - Geographical coordinates = simple method, but not very convenient for different ellipsoids. - Three-dimensional cartesian coordinates, the most rigorous method in the case where the so-called geoid correction has been made. - Coordinates in conformal projection. An analysis of the main formulas that can be used is studied by the first author in this article.

Comments: 27 Pages. In French. It is an-update version of a paper dated 1979 with comments of the second author.

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Submission history

[v1] 2019-05-13 11:00:44
[v2] 2019-05-14 08:30:24

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