The Calibration Methodology of a Low Cost Land Vehicle Mobile Mapping System

Y-H. Li

Abstract:	Since INS is applied in civil applications, its related developments increase as time goes by. The mobile mapping system is one of the most important civil applicaiotns of INS/GPS integrated systems because of its rapidly direct geo-referencing capability which is useful in Geospatial Information acquisition for Taiwan, a small island with high population. In this study, a low cost INS/GPS integrated POS, was developed and applied to provide the positional and orientation information seamlessly. In addition, the Meinberg GPS170PCI timing board was applied to synchronize measurements provided by those sensors. For system calibration, a high-accuracy ground control field was established by means of the ground survey. The measurements collected by the proposed system from the control field were added to the bundle adjustment procedure to solve the lever-arm and boresight angles between those image sensors. Based on the parameters obtained after calibration, the proposed system could perform direct geo-referencing tasks. This study describes the architecture of the proposed system and the establishment of the control field. Then a two-step approach with some strategies are proposed to conduct system calibration. Finally, the system test, error analysis, and the results of system calibration are presented. The results of the experiment depict that the accuracy of direct geo-referencing capability in term of the positioning accuracy of the proposed is less than 15cm (HPE) and 28cm (3D). The analysis proves the stability of proposed system is high, and the applications in the disaster assessment or the highway inventory investigation are also feasible. While the maturity of the related technology becomes higher, the system can provide more contribution in the future.
Published in:	Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010) September 21 - 24, 2010 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	978 - 990
Cite this article:	Li, Y-H., "The Calibration Methodology of a Low Cost Land Vehicle Mobile Mapping System," Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010), Portland, OR, September 2010, pp. 978-990.
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