Abstract
Abstract. Nowadays most airborne photogrammetric and remote sensing systems are equipped with GNSS receivers and inertial sensors that allow the use of various orientation methods: from Direct Sensor Orientation (DiSO) to Integrated Sensor Orientation (ISO), all the way to "Fast Aerial Triangulation" (Fast AT), a new orientation method recently proposed by the authors of this paper. On the one hand, DiSO is the fastest method. It only needs the INS/GNSS time-position-attitude aerial control information and the previously calibrated system constants as the lever-arm vectors and boresight matrices. On the other hand, ISO is the most accurate and robust orientation and calibration method. It uses all the available information: a large number of image coordinates, some ground control points and the INS/GNSS time-position-attitude aerial control information. Fast AT is a new orientation method that combines the image measurement of few ground control points, the coordinates of these ground control points and the time-position-attitude aerial control information. Fast AT is clearly an alternative to DiSO, even an alternative to ISO depending on project specifications. Our preliminary results with regular blocks indicate that Fast AT performances are closer to the ISO than to the DiSO results. In the light of the good results for block aerial mapping, in this paper we investigate Fast AT performance for corridor aerial mapping: we briefly review the concept, discuss its geometry and analyse its potential for corridor aerial mapping.
Highlights
Today, photogrammetric and remote sensing sensors together with INS/GNSS equipment constitute the common data acquisition configuration for mapping systems
Fast Aerial Triangulation” (Fast AT) is a particular case of Integrated Sensor Orientation (ISO) characterized by the use of INS/GNSS-derived position and attitude aerial control, the coordinates of few ground control points (GCPs) and its corresponding image coordinates
In this paper we review the concept and geometry of the proposed Fast AT orientation procedure and we validate this method for the corridor aerial mapping application
Summary
Photogrammetric and remote sensing sensors together with INS/GNSS equipment constitute the common data acquisition configuration for mapping systems. Fast AT is a particular case of ISO that allows us to orient the sensor and calibrate the system with less information It consists of the use of image measurements of only few GCPs to the INS/GNSS aerial control information. In spite of the good results presented in (Blazquez and Colomina, 2012a), we do not claim that Fast AT replaces DiSO or ISO It is just a new orientation method that depending on the project specifications can be a good alternative to ISO, for example, if image matching is difficult because of the ill-textured areas, or a good alternative to DiSO if some GCPs are available. We present the conclusions of the perfomance of Fast AT for corridor aerial mapping
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