Stability of the points of the Hungarian geodetic control networks

Following a short historical survey of the Hungarian geodetic control networks the author analyses four Hungarian networks measured after the introduction of the Schreiber angle measurement method (1878), namely those measured by the Milit\ärgeographisches Institut Wien (1878-1899), the first order network in Transdanubia measured in 1901-1908, the new triangulation network measured in 1925-1942 and the network HD72 started in 1950. The presented results are Ferrero's mean square angular errors (Table I), comparison of the form of the networks, determination of the co-ordinate differences of the point transfers (Table II), then for identical points the comparison of direction measurements from the station adjustment (Tables III-VIII). The conclusion of this study is that historical Hungarian triangulation measurements are not applicable for the detection of exact point movements