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The encroachment of wireless mobile technology had led to the advancement of tracking system through the mobile device. This paper concentrate on delivering the indoor tracking system that utilized the 3D virtual world as the representation of indoor sensing information. (Virtual Reality Modeling Language) VRML is powerful 3D modeling software that suitable to build the virtual map for visualization on the PDA. Moreover, culling algorithm is integrated to decrease the rendering time of VRML files on the PDA.
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