ABSTRA4CTThe prototype development of VISAT, a precise mobile survey system for road inventory and associated GIs applications, is discussed in this paper. The system integrates inertial, satellite, and CCD camera technology to achieve an overall positioning accuracy of 0.3 m (1 ft) or better for all objects within a 50 m corridor on both sides of a highway. Combining the high positioning accuracy of GPS with the precise pointing accuracy of INS, a cluster of CCD cameras will be accurately positioned and oriented at ,my instant of time. Using this information, objects dong tile highway can be precisely surveyed in three dimensions b! ; processing the digital image information of the CCD c'unera cluster. The system concepts will be discussed in this paper. Special emphasis will be given to sensor integration, testing of the INS/GPS component and data flow from the acquisition process to the workstation environment.
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