期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2007
卷号：17
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：The aim of this study was to determine the precision of GPS-coordinates of projection centres obtained in real blocks. Another goal of the work was to estimate the reliability of this group of measurements in aerial triangulations for three scales of aerial photographs. The study was based on renewed data preparation from production blocks,strictly obeying conditions of correctness of adjustment. The adjustment was preceded by the pre-adjustment detection of gross errors and bad assignment of measurements into GPS profiles,using a method developed by the author. Production results were derived from various measurement systems and adjustment software;they were characterized by numerous imperfections concerning functional and statistical model,generally resulting from the applied technologies. A set of 25 blocks was selected for testing,including three scales of aerial photographs: 1:13 000,1:19 000 and 1:26 000,most frequently used in Poland. The presence of the projection centre measurements (on the average for 90% of photographs in the block) was the second important feature of selected blocks. The number of photographs in one block varied from 136 to 3402,and the total number of photographs in all blocks was about 30 000. A priori standard deviation of GPS-coordinates,obtained from 25 adjustments,reach 10.7 cm on the average. This value can be used in simulations for optimisation of aerial triangulation. Analysis of global internal reliability of GPS-coordinate for particular scales revealed that,in blocks of photographs at scale 1:13 000,the average redundancy component reached 0.50 for X,0.48 for Y and 0.75 for Z coordinate. Therefore,it can be concluded that the reliability of GPS-coordinates of projection centres in these aerial triangulations was good. For these blocks,RMS residual of GPScoordinates reached 76 % of the a priori standard deviation,on the average. For scales 1:19 000 and 1:26 000,in 9 out of 15 blocks the global redundancy component of horizontal GPS-coordinates was lower than 0.25. Good level of reliability was obtained only for one block. For these blocks RMS residual of horizontal GPS-coordinates reached 56 % of the a priori standard deviation,on the average.
其他摘要：Celem badań było określenie precyzji pomiaru środków rzutów uzyskiwanej w rzeczywistych blokach. Drugim celem badań było określenie niezawodności tej grupy pomiarów w aerotriangulacjach dla trzech skal zdjęć lotniczych. Badania oparto na ponownym opracowa
