16 July 2002 Multiresolution terrain depiction and airport navigation function on an embedded SVS
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Abstract
Many of today's and tomorrow's aviation applications demand accurate and reliable digital terrain elevation databases. Particularly, to enhance a pilot's situational awareness with future 3D synthetic vision systems, accurate, reliable, and hi-resolution terrain databases are required to offer a realistic and reliable terrain depiction. On the other hand, optimized or reduced terrain models are necessary to ensure real-time rendering and computing performance. In this paper a method for adaptive terrain meshing and depiction for SVS is presented. The initial dat set is decomposed by using wavelet transform. By examining the wavelet coefficients, an adaptive surface approximation for various level-of-detail is determined at runtime. Additionally, the dyadic scaling of the wavelet transform is used to build a hierarchical quad-tree representation for the terrain dat. This representation enhances fast interactive computations and real-time rendering methods. For the integrated airport navigation function an airport mapping database compliant to the new DO-272 standard is processed and integrated in the realized system. The used airport database contains precise airport vector geometries with additional object attributes as background information. In conjunction these data set can be used for various airport navigation functions like automatic taxi guidance. Booth, the multi-resolution terrain concept and airport navigation function are integrated into a high-level certifiable 2D/3D scene graph rendering system. It runs on an aviation certifiable embedded rendering graphics board. The optimized combination of multi- resolution terrain, scene graph, and graphics boards allows it to handle dynamically terrain models up to 1 arc second resolution. The system s and dat processing acknowledges certification rules based on DO-178B, DO-254, DO-200A, DO- 272, and DO-276.
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Thorsten Wiesemann, Thorsten Wiesemann, Jens Schiefele, Jens Schiefele, Joachim Bader, Joachim Bader, } "Multiresolution terrain depiction and airport navigation function on an embedded SVS", Proc. SPIE 4713, Enhanced and Synthetic Vision 2002, (16 July 2002); doi: 10.1117/12.474427; https://doi.org/10.1117/12.474427
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