Comparison of the Accuracy of Photogrammetry Blocks Adjustment Using GPS data with Independent and Bundle Adjustment Methods

The collection of ground control points for photogrammetric blocks adjustment is one of the costly and time-consuming parts of photogrammetric surveying, and photogrammetrists have always sought a way to reduce the number of ground control points to the extent possible. Today, the application of GPS data in surveying activities has been widely considered: from acquisition of coordinates of ground control points to the obtainment of the coordinates of image centers and camera justification parameters at the moment of shooting, in Mobile Mapping, cadastral surveying and in combination of GPS data with INS2 data which is currently undergoing extensive research, because it reduces the number of control points. In this study, the precision of adjusted blocks with the help of GPS auxiliary data in the adjustment of the 1:25000 blocks of Iran with independent and bundle adjustment models methods has been examined, and the results of the study show that it gives satisfactory precision on the considered scale for the region of Iran.