Vehicle-borne Highway Geometric Alignments and Facilities Data Capture Using DGPS and GPS/GIS Integration

Xiaolin Meng

Abstract:	In this paper, the author demonstrates how real-time Dif-ferential GPS (DGPS) could be used for highway geomet-ric alignments and facilities positioning. The basic con-figuration for a highway data capture system is illustrated. Since GPS could supply large, high accuracy, “fresh”, cost-effective and timely spatial data, it is gradually be-coming one of the main data capture and update methods for GIS-T. When GPS are adopted for the location posi-tioning to highway geometric alignments and facilities, the results is usually a series of discrete coordinates in WGS 84. The highway agencies often use continuously expressed mileage (spatial) to match with a vast variety of distance-distributed highways attributes. To realise the correct information match, there is need to establish a high accurate linear reference system (LRS). This is the precondition and also the starting point in using the inte-grated GPS/GIS to solve the land surface transportation problems (A. Vonderohe; K. J. Dueker and R. Vrana, 1992; R. W. Stokes and G. Marucci, 1995). Conventional straight line-based distance calculation algorithm in LRS is by definition inaccurate on curvilinear segments, which is the domain technology when dynamic segmentation is used for data retrieval or visual display. In this paper, a simple and practical data model for highway characteris-tic feature identification, 2D (3D) coordinates to 1D mile-age transformation, curvilinear length calculation is pre-sented. Some mathematic formulas are developed. Other foci of this paper are on the exploitation of the potential usage for the collected GPS data. Based on the above methodologies and as a prototype of integrated GPS/GIS applications, a highway geometric alignment and facility information system is developed for an about 13-km ele-vated urban road in Shanghai, China.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	1667 - 1674
Cite this article:	Meng, Xiaolin, "Vehicle-borne Highway Geometric Alignments and Facilities Data Capture Using DGPS and GPS/GIS Integration," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 1667-1674.
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