TRANSFORMATION ANALYSIS OF GEODETIC POINTS POSITIONAL STABILITY ON THE BASIS OF ROBUST M – ESTIMATIONS

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-59-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book2 Vol. 2, 673-680 pp

ABSTRACT
Deformation analysis of different objects or landslide territorial units carried out on the
basis of the evaluation of epoch observations realized by geodetic methods, belongs to
theoretically quite difficult tasks. The problem is even more complex if there are doubts
about the stability of datum points. Underestimating of this fact may lead to
misinterpretation of the relative geometric changes of geodetic deformation network and consequently to an erroneous evaluation of positional changes of observed points.
Because in this case regards to a non-random, systematic disturbing influence, the
present article points out on the reasonableness and advantages of applying robust
estimations in terms of objectively describing of geometrical changes of the positional
deformation network.

Keywords: transformation, stability analysis, positional point displacements, robust Mestimators