Capturing Urban Infrastructure Data Using Mobile Mapping System

Guangping He, Greg Orvets, Richard Hammersley

Abstract:	Data acquisition is the most expensive part of establishing an Infrastructure database A mobile mapping system, the GPSVision, which integrates the Global Positioning System (GPS), an Inertial Navigation System (INS) and stereo cameras, has been developed to quickly and accurately collect the digital data of civil infrastructures. While the mobile mapping system drives at a normal speed, the GPS and INS record the position and attitude information of the system, and the stereo vision system takes image pairs at regular interval. Af?er GPS/INS data is processed, every image pair is georeferenced in the global coordinate system. Any features which are visible on an image pair can be located in a global coordinate system. From an application perspective, a mobile mapping system can be used to collect stereo digital images along city streets, state roads and highways, while traveling at posted speed limits. These digital images are accessed by feature extraction sofiware to locate the positions of visible physical facilities, such as manholes, curb lines, traffic signs, pedestals and building locations. The positions and attributes of these visible features are stored in a simple format which is transportable to standard GIS systems. Once the processed data is loaded into the target GIS, the data is displayed in map format and manipulated utilizing database query functions. A typical client could use these data to accurately position traffic signs, develop base maps or view image data as one drives down the road. This paper will discuss the basic issues of a mobile mapping system. A brief description of the system configuration is given, followed by the integration of GPYINS using a kalman filter, and system calibration for determining the offsets between the different sensors. How the position and attributes of a feature is collected and transferred into a GIS are addressed. Finally, the data sets collected by a mobile mapping system are presented to demonstrate the etticiency and applications of the mobile mapping system.
Published in:	Proceedings of the 52nd Annual Meeting of The Institute of Navigation (1996) June 19 - 21, 1996 Royal Sonesta Hotel Cambridge, MA
Pages:	667 - 674
Cite this article:	He, Guangping, Orvets, Greg, Hammersley, Richard, "Capturing Urban Infrastructure Data Using Mobile Mapping System," Proceedings of the 52nd Annual Meeting of The Institute of Navigation (1996), Cambridge, MA, June 1996, pp. 667-674.
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