DBPapers

USING COMBINED GPS AND LASER TEHNIQUES FOR HEIGHT DETERMINATION

AUTHOR/S: R. PAAR, A. MARENDIC, K. BABIC, J. VLADANOVIC
Sunday 1 August 2010 by Libadmin2008

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 2, 477-484 pp

ABSTRACT

GPS RTK method has never achieved millimetre vertical accuracy. For the most
common geodetic tasks such as surveying, staking out and monitoring, GPS RTK
method in many cases has been limited by its measuring accuracy. Before the
appearance of the new Topcon Lazer ZoneTM technology, we were able to achieve
centimetre vertical accuracy (from 1 to 3 centimetre) using GPS RTK systems.
Combining Topcon Lazer ZoneTM technology and Topcon GPS RTK HiPer Pro system
accuracy of height determination can be increased to a millimetre level.

Comparison of the above mentioned system and the conventional methods of the height
determination will be presented in this paper. Elevation will be measured by geometric
levelling method, trigonometric levelling method and GPS RTK method. This paper
will try to examine whether it is possible to achieve millimetre vertical accuracy
declared by manufacturer. Then the Topcon Lazer ZoneTM technology will be compared
with the conventional methods. Finally, advantages, possible disadvantages, and
accuracy of Topcon Lazer ZoneTM system will be shown in this paper.

Keywords: GPS, laser technology, height determination, accuracy.