NEXUS Acquisition of Position Information for Location Aware Applications using Multi Sensors and Mobile Photogrammetry

Darko Klinec and Dieter Fritsch

Abstract:	The research project NEXUS aims at the development of a generic platform that supports location aware applications – also called ‘Location Based Services (LBS)’ – with mobile users. Within NEXUS the world is represented by spatial models, which describe the real world supplemented by virtual objects. The virtual objects act as brokers between the platform and external information sources and services. Interactions between the mobile users and the virtual or real world objects are realized by using the actual position information. To determine the actual position of the mobile users in different areas, it is necessary to use different positioning techniques. GPS, compass and mobile photogrammetry are able to provide the important location information. The use of small DGPS receivers integrated in PDAs e.g. provides the users actual position in the outdoor area. In situations and areas where GPS fails, mobile photogrammetry is a possibility to overcome this problem. Using a small digital camera and image processing techniques the system is able to determine objects as well as the (indoor) position of the person wearing the camera. The telepointing device, which is a part of the NEXUS system, offers the possibility to identify objects, e.g. buildings, etc. By pointing to a building the object becomes located using the spatial model of the world and the computed telepointing parameters. Once the location of the object is available any stored information about the object can be provided. The paper will show the main ideas and concepts of NEXUS, describing a multi sensor tool and mechanisms for locating pedestrians. The access to information sources, location aware information and services as well as telepointing using mobile photogrammetry will be pointed out.
Published in:	Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001) September 11 - 14, 2001 Salt Palace Convention Center Salt Lake City, UT
Pages:	3112 - 3118
Cite this article:	Klinec, Darko, Fritsch, Dieter, "NEXUS Acquisition of Position Information for Location Aware Applications using Multi Sensors and Mobile Photogrammetry," Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 3112-3118.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In