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1.2 COMPUTER AND INFORMATION SCIENCE
This paper presents three Spatial Search Algorithms for determiningthe three dimensional visibility shape (threat dome) at a user’s current locationin a built environment. Users then utilize this 3D shape as their query“window” to retrieve information on only those objects visible within a spatialdatabase. Visibility shape searching addresses the information overloadproblem by providing “Hidden Query Removal” functionality for mobile LBS.This functionality will be especially useful in the Web 4.0 era when trillions ofmicro-sensors become available for query through standard IP access.
Yin, J. & Carswell, J. (2012) Effects of Variations in 3D Spatial Search Techniques on Mobile Query Speed vs Accuracy. Web & Wireless GIS 2012; Naples Italy, 12-13, April. Springer LNCS Vol. 7236.