DOI: 10.5593/SGEM2014/B23/S11.062


O. Coltan, V. Ciolac, E. Pet, I. Pet., E. Nistor, L. Barliba, Nilanchal Patel
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-12-4 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 3, 491-496 pp

The paper aimed was to achieve thickening network, by GPS methods in Borod village, Bihor County. In Romania, the Borod village is located in the Great Depression Vad – Borod, located in the upper basin of Crisul Repede in the northwest of Apuseni Mountains. It borders in the north with Plopisului Mountains, with piedmont hills of Padurea Craiului Mountains and Crisul Repede River waterside in eastern and southern. To achieve the network support, was used the static method with five dualfrequency GPS receivers L1/L2 Trimble R8 type and two dual-frequency GPS receivers Leica L1/L2 1200 with AX 1202GG antenna. The receivers were set to record data every second. Last ones embedded radio module which allows them to configure the RTK system. The receivers are of new generation and dual-frequency signals allowing and recording code P. The fact that they can use up to 220 channels allow simultaneous use of both satellite systems GPS-NAVSTAR and GLONASS. As fixed reference points were established permanent stations Cluj, Bihor, Beius and Zalau, which comply with geometric criterion, forming a shapely triangle. Borod has an area of 12,000 ha of which 9000 ha rural land. To measure an area so large 5 teams worked from which the first four teams were equipped by Leica TCR 850 total station and the last team used the GPS. The observations of the network have been carried out in two sessions, on different days, and the runtime of a new point was three hours and thirty minutes. Measurements processing was made with the Trimble Total Control V 2.73 software. After processing were determined the following elements: three-dimensional coordinates in the geometric system (x, y, z), in the ETRS ’89 system; coordinates of the points in the World Geodetic System (B, L, H ellipsoidal) in the ETRS’89 system; coordinates of the points in the projection of national plane Stereographic 1970. Coordinate transformation from ETRS ’89 system in projection plane Stereographic 1970 was made by TransDat V 4.01 program. Network compensation was performed with the program TEREMODEL and for network adjustment was used the AJUSTAMENT option. After two sessions of measurements on the surface of Borod village, were determined 10 new points to be used in cadastral surveying work needed in the area. In the GPS measurements campaign for achieving network support of Borod area from Bihor County was confirmed the performance of GPS technology and its advantages compared to conventional surveying methods. Due to the advantages posed by GPS technology, we propose its use in measurements and re-measurements of support networks.

Keywords: coordinates, GPS, measurements, network support, receivers, surveying

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