>> 《Geospatial Information Technology for Emergency Response》简述

Part 2 Data collection and products

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Terrestrial mobile mapping towards real-time geospatial data collection　

J. Li
University of Waterloo,Waterloo, Ontario, Canada

M.A. Chapman
Ryerson University, Toronto, Ontario, Canada

ABSTRACT: Airborne and spaceborne remote sensing has proved their critical role in collecting geospatial data covering a relatively large geographic region in support of emergency response and disaster management. However, they fall short of capturing adequate urban details due to the limitations of spatial resolution and viewing angle. The advancement of navigation and imaging sensor technologies enabled land-based mobile mapping systems to rapidly and cost-effectively acquire detailed geospatial data on the ground. This paper provides a review of the operational principles and the state-of-the-art development of terrestrial mobile mapping technology. Following an overview of the existing systems, multi-sensor integrated mapping technology is described. The key concept of direct georeferencing is outlined. The sensors as well as their accuracy aspects are addressed. As an example, results of 2D and 3D object data collection obtained by ARAN – a Roadware terrestrial mobile mapping system are presented. The future research and development of mobile mapping towards ubiquitous mapping is summarized.