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STUDY IN GEODETIC REFERENCE SYSTEMS

Geodesy is the science that deals with observations, measurements and calculations, in order to define the shape, size and gravity field of the earth including the associated variations in time.

The geometric reference system in geodesy is known to be the context of parameters and coordinate systems associated with a particular area or a particular place or to the entire earth. The position of spots and objects at the physical surface of earth as well as their movement and dynamic behavior in time are being studied in association to the geometric reference system.

In his award-winning PhD theses, Dr. Dimitris Ampatzidis, aimed at exploring strategies, which will lead to the implementation of an optimal Geodetic reference system of the Hellenic area, which is characterized by an overwhelming geodynamic behavior. This is because intense tectonic deformations affect the field of displacement speed of the parts of the earth that belong in this specific area, in a unique way for the European standards.

The need to implement an optimal Geodetic Reference System in the Hellenic area

The research and the award-winning project

The project studied the implementation of a modern geodetic reference system for topographic and cartographic applications, in areas with strong inhomogeneous, geodynamic behavior, such as Greece.

Its innovation is based on the use of a new optimal criterion for determining coordinates and displacement speed in a permanent stations GPS network, which minimizes the total kinetic energy of the reference system.

The specified shift speeds present improved statistical properties according to the criterion of the project, (smaller average and smaller standard deviation) in relation to the corresponding values of the original reference system, in which the initial processing and adjustment of the GPS measurement network took place. Furthermore, they implement a reporting system with the smallest possible temporal changes to the relative positions of the reference stations.

The project was awarded a prize by the EUREF symposium, held in Moldova, in 2011. The scientific committee of the conference, described the proposal as very interesting and encouraged its implementation in countries with similar problems to Greece.

Award-winning Project

The project was developed as part of the PhD theses of Mr. Dimitrios Ampatzidiis, under the supervision of the Professor of Aristotle Univerity of Thessaloniki (AUTH), Mr. Ch. Kotsakis, and of the advisory members, Mr. Katsampalos and D. Rossikopoulos.

The project has already been published in the official records of the international conference of EUREF, which was held in Chisinau, Moldova in May 2011, and has been published in the Journal of Geodynamics magazine.

Furthermore, it has been published in the National Cadastre and Mapping Agency S.A (NCMA) for possible application to a new development of the geodetic reference system in Greece.

ARISTOTLE UNIVERSITY OF THESSALONIKI

FACULTY OF ENGINEERING, SCHOOL OF RURAL AND SURVEYING ENGINEERING, DEPARTMENT OF GEODESY AND SURVEYING

Team members: Dr. Dimitrios Ampatzidis, Professor Christopher Kotsakis, Professor Konstantinos– Vasileios E. Katsampalos

PhD Theses EURΕF 2011 Poster Student Prize