Comparison of lever arm determination methods in terms of their effect of the accuracy of aerial triangulation

Abstract

With the help of aerial remote sensing, especially when we are talking about large aircraft surveys, we can collect a large amount of information from a large area in a short time. In order for the resulting, in our case, photo-based (photogrammetric) data to be used for engineering purposes, it is important to ensure their accuracy. One of the components of this, in addition to an appropriately accurate camera model, is knowing the 3D position of the photographs and their spatial position with great accuracy. Knowing these, we can perform aerial triangulation. Since these data cannot be measured directly, we need to know the eccentricity vectors of the measuring devices (GNSS/IMU) with respect to the main points of the cameras. In this study, we will examine the effect of the accuracy of different measurement methods (engineering geodesy, laser scanning, software estimation) on the results of aerial triangulation.