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Proceedings Paper

The accuracy influence of integrated GPS/INS for direct georeferencing in digital line scanning imagery
Author(s): Yun Zhan; Chun Liu
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Paper Abstract

With available high performance GPS/inertial systems (GPS/INS) witch supports direct platform orientation (DPO), direct georeferencing is shown to be a serious alternative to standard indirect image orientation using classical or GPS-supported aerial triangulation (AT). Since the positioning accuracy of direct georeferencing without ground control relies on the accuracy of the six exterior orientation parameters (EOP: three coordinates of the perspective centre, and three rotation angles known as φ, ω, κ ), special focus has to be laid on the analysis of the GPS/INS influence on the positioning accuracy. The investigations presented in this paper give an approach based on simulated data deriving from SPOT data. This paper describes the mathematical formulation of the model and analyses the results achieved by testing it on SPOT images observations for the external orientation. The ground coordinates of 40 ground control points (GCPs) are available and used as reference data for the results' analysis. In this paper, the investigation conclusions will be practical to GPS/inertial system application and manufacture, and be helpful to get knowledge of its affluence on positioning accuracy.

Paper Details

Date Published: 28 October 2006
PDF: 14 pages
Proc. SPIE 6418, Geoinformatics 2006: GNSS and Integrated Geospatial Applications, 641807 (28 October 2006); doi: 10.1117/12.712259
Show Author Affiliations
Yun Zhan, Tongji Univ. (China)
Chun Liu, Tongji Univ. (China)
State Bureau of Surveying and Mapping (China)

Published in SPIE Proceedings Vol. 6418:
Geoinformatics 2006: GNSS and Integrated Geospatial Applications
Deren Li; Linyuan Xia, Editor(s)

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