DBPapers
DOI: 10.5593/sgem2017/23/S11.072

MAP PROJECTIONS USED IN ROMANIA FOR MILITARY PURPOSES: LAMBERT-CHOLESKY AND GAUSS- KRÜGER

D. Vasilca, A. Iliescu-Cremeneanu, A. C. Badea, G. Badea
Thursday 14 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-03-4 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 23, 581-588 pp, DOI: 10.5593/sgem2017/23/S11.072

ABSTRACT

The current article presents two map projections used in Romania mainly for military purposes, namely Lambert-Cholesky (from 1917 to 1931) and Gauss-Krüger (from 1955 to 1971). After a brief description of their individual characteristics and particularities of application in our country, a comparison of the distortions produced by both projections was presented in order to emphasise their various advantages. The accuracy of relief representation using contour lines on maps drawn to scales of 1:20,000 and 1:25,000 in the above projections were also subjected to comparison. Both map projections presented therein are conformal. Therefore, with regards to their linear and areal distortions for Romanian territories, they are negative in the Lambert- Cholesky projection and positive in the Gauss-Krüger projection. The absolute values of the distortions are almost double in the Lambert-Cholesky projection compared to Gauss-Krüger. In order to compare the accuracy of relief representation, ten transverse profiles were made between the same points identified on maps in both projections. Only minor differences were observed, proving that the elevations were determined by comparable methods in terms of accuracy.

Keywords: Lambert-Cholesky map projection, Gauss–Krüger map projection, map distortion