Abstract
Wayfinding in unfamiliar indoor and outdoor environments are particularly intricate problems of all the people’s activities. The development of assistive technologies to aid wayfinding is hampered by the lack of reliable and efficient methods providing location information in the environment. Location-based services (LBS) are systems which support wayfinding task as process. They do not support landmark-based wayfinding although researchers agreed on its efficient role. In addition, one of the challenges of LBS is the continuous query which guarantees the performance of the system. In this paper, we propose an efficient method for 3D continuous k-NN query. Our method is based on three ideas, (1) The dynamic mobile objects have 3D coordinate space (x,y,t) and static landmark with 2D spaces (x,y) (2) selecting landmarks which are the nearest neighbor of one or more continuous queries, (3) indexing the queries rather than the landmarks. Through some experimental evaluation we demonstrate that our method is applicable on increasing runtime and decreasing power consumption of mobile devices.
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Samany, N., Delavar, M.R., Saeedi, S., Aghataher, R. (2009). 3D Continuous K-NN Query for a Landmark-based Wayfinding Location-based Service. In: Lee, J., Zlatanova, S. (eds) 3D Geo-Information Sciences. Lecture Notes in Geoinformation and Cartography. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-87395-2_17
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DOI: https://doi.org/10.1007/978-3-540-87395-2_17
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