Use of Satellite Imagery for Establishing Road Horizontal Alignments
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Volume 133, Issue 1
Abstract
Generating fast and inexpensive digital road maps and databases from high-resolution satellite imagery is becoming possible for various applications. This paper presents a new method for establishing road horizontal alignment using IKONOS spatial resolution imagery. Road extraction algorithms were developed for two types of horizontal curves: Simple circular curves and reverse circular curves. The method requires only two and three unknown parameters for simple and reverse curves, respectively. Unlike existing methods of circle detection, the proposed method performs the search procedures in a much smaller area than the image size and achieves faster computations. The derived curve parameters represent useful inputs into a geographic information system database. The developed method has been tested using IKONOS images for simple and reverse curves. The results show that the proposed method converges in all cases and can be used for accurately establishing road horizontal curves.
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Acknowledgments
The writers wish to thank Anthony Sani of Spatial Geo-link in Toronto for his support with the latest version of ERDAS Imagine. The IKONOS imagery was provided by the Greater Toronto Airports Authority. This research was supported by a discovery grant from the Natural Sciences and Engineering Research Council of Canada.
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Published In
Journal of Surveying Engineering
Volume 133 • Issue 1 • February 2007
Pages: 29 - 35
Copyright
© 2007 ASCE.
History
Received: Sep 9, 2002
Accepted: Feb 22, 2005
Published online: Feb 1, 2007
Published in print: Feb 2007
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