RESEARCH ON THE GEODETIC NETWORKING THICKENING BY GPS MEASUREMENTS IN LUGOJ TOWN PUBLISHEDOctavius Nicolae Coltan, Valeria Ciolac
The work was focused on the thickening of geodetic network in Lugoj town. The absolute rectangular coordinates for 40 points were determined, using the „fast static” method. Thickening GPS determined points, can be used in topographical measurements, which will be made in Lugoj town. The paper work was focused on the thickening of geodetic network in Lugoj using GPS technology. Using the GPS device has the advantage of not requiring angular and distance measurements, eliminating the drawbacks of using total stations, is worth mentioning that by developing the method stop / go kinematic is possible to determine accurate coordinates provided by comparison with the total stations and a convenient time. To determine the coordinates of those 40 points studied was used “rapid static” method, with six equipments Leica 1200 with dual frequency L1/L2. As fixed points were used: Sura, Watched Hill, New Salbagelul and Ohaba Valley, points that served as support for determining coordinates of the new points. For all the terminals were made two sessions of measurements with four fixed reference points: Throne Hill, Ohaba Valley, New Salbagelul and Sura, and two rovers points on new points. To obtain more accurate results and to ensure stability and confidence in solutions, specialized software was used in GPS data processing, namely Leica Geo Office software that allows data processing and clearing network simultaneously. After processing, the data were obtained absolute rectangular coordinates (x, y, z) of those forty points in Stereographic Projection System 1970, and for rate was taken the Black Sea as a benchmark. The work performed provides accuracies required by the technical rules in force. Thickening points located by GPS, can be used in the topographic surveys to be performed in future in Lugoj. During the campaign of GPS measurements to achieve Lugoj support network, have once again confirmed the performance of GPS technology and advantages that it has over traditional surveying methods.
fast static; GPS measurements; absolute rectangular coordinates; geodetic network