Journal of applied mathematics & informatics

The Korean Society for Computational and Applied Mathematics (한국전산응용수학회)
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A THREE DIMENSIONAL LOCATION SYSTEM FOR HIKER WALKING SPEEDS BASED ON CONTOUR LINES

  • Wu, Mary (Computer Science of Yeungnam University) ;
  • Ahn, Kyung-Hwan (S/W R&D Group, Mobile Communication Division, Samsung Electronics Ltd.) ;
  • Chen, Ni (Computer Engineering department at Yeungnam University) ;
  • Kim, Chong-Gun (Department of Computer engineering, Yeungnam University)
  • Published : 2009.05.31
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Abstract

GPS is especially suitable for location systems in flat areas, but the availability of GPS is limited in highly urbanized and mountain areas, due to the nature of satellite communications. Dead reckoning is generally used to solve a location problem when a pedestrian is out of range of GPS coverage. To extend the apparent coverage of the GPS system for a hiker in mountain areas, we propose an integrated 3D location system that interpolates a 3D dead reckoning system based on information about contour lines. The speeds of hikers vary according to the inclination of the ground in sloped areas such as mountains. To reduce location measurement errors, we determine the angle of inclination based on the contour lines of the mountain, and use the speeds based on the inclination in the location system. The simulation results show that the proposed system is more accurate than the existing location system.

Keywords

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