The feasibility of applying automatic target recognition in trigonometric levelling

• Autorzy: Próchniewicz D. , Szpunar R. , Walo J. , Pachuta A.
• Konferencja: Current problems of engineering surveying / Proceedings of the 8th Scientific Technical Conference (VIII ; 30-31.03. 2007 ; Warsaw-Białobrzegi, Poland)
• Języki publikacji: EN

Abstrakty

EN

The obtained results of the field experiments fully confirmed the feasibility of applying ATR systems in trigonometric levelling. In the tested span experiment at Józefosław, the value difference of height differences obtained with precise geometric levelling and the mean value of all measurements differed by a mere 2.7 mm, and for midnight measurements - it did not exceed 1 mm. The measurements made in the Pieniny Range were also successful in the case of observation compatibility and limiting the impact of atmospheric refraction on measurement results. Unfortunately, the comparison of the obtained height differences with those of 5 years ago showed considerable discrepancies stemming from benchmark subsiding rather than technological accuracy of trigonometric levelling. To verify this thesis it is planned to repeat trigonometric measurements on the testing ground in the Pieniny and to carry out control measurements by means of precise geometric levelling. Summing up, one can note that the use of tacheometers along with ATR enables to automate measurements and related quasi-continuous observations. These traits enable moreover: - to increase the number of observations, and what follows, increase accuracy and reliability of the zenithal length determined, - to average measurements made over a long period, which enables to undermine the influence of atmospheric refraction on the value of height difference measured, - to make observations in different atmospheric conditions, including nighttime when the atmosphere is stable, - to eliminate personal errors of the observer, - to analyze conducted observations in real time.

Słowa kluczowe

EN

trigonometric levelling; electronic tacheometer; engineering surveying

PL

niwelacja trygonometryczna; niwelacja precyzyjna; tachymetr elektroniczny; pomiary geodezyjne

• Wydawca: Wydział Geodezji i Kartografii Politechniki Warszawskiej
• Czasopismo: Reports on Geodesy
• Rocznik: 2007
• Tom: z. 1/82
• Strony: 267--273
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Próchniewicz D.

autor

Szpunar R.

autor

Walo J.

autor

Pachuta A.

• Institute of Geodesy and Geodetic Astronomy Warsaw University of Technology, Pl. Politechniki 1, 00-661 Warsaw

Bibliografia

• J. Walo, A. Pachuta, T. Olszak: Badanie geodynamiczne pienińskiego pasa skałkowego w rejonie Czorsztyna - Przeniesienie wysokości przez Zalew Czorsztyński metodą niwelacji trygonometrycznej. Oficyna Wydawnicza Politechniki Warszawskiej, 2004.
• D. Próchniewicz: Niwelacja trygonometryczna z wykorzystanie tachimetrów z automatycz-nym rozpoznawaniem celu. Praca magisterska, PW, 2006.
• A. Makowska: Niwelacja precyzyjna - rozdział 2: Precyzyjna niwelacja trygonometryczna. Polskie Przedsiębiorstwo Wydawnictw Kartograficznych, 1993.