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Seamless Mapping of River Channels at High Resolution Using Mobile LiDAR and UAV-Photography
Department of Geography and Geology, University of Turku, FI-20014 Turku, Finland
Department of Real Estate, Planning and Geoinformatics, School of Science and Technology, Aalto University, FI-00076 Espoo, Finland
Department of Remote Sensing and Photogrammetry, Finnish Geodetic Institute, P.O. Box 15, FI-02431 Masala, Finland
Helsinki Metropolia University of Applied Sciences, Civil Engineering and Building Services, FI-00079 Helsinki, Finland
* Author to whom correspondence should be addressed.
Received: 10 October 2013; in revised form: 6 November 2013 / Accepted: 18 November 2013 / Published: 27 November 2013
Abstract: Accurate terrain models are a crucial component of studies of river channel evolution. In this paper we describe a new methodology for creating high-resolution seamless digital terrain models (DTM) of river channels and their floodplains. We combine mobile laser scanning and low-altitude unmanned aerial vehicle (UAV) photography-based methods for creating both a digital bathymetric model of the inundated river channel and a DTM of a point bar of a meandering sub-arctic river. We evaluate mobile laser scanning and UAV-based photogrammetry point clouds against terrestrial laser scanning and combine these data with an optical bathymetric model to create a seamless DTM of two different measurement periods. Using this multi-temporal seamless data, we calculate a DTM of difference that allows a change detection of the meander bend over a one-year period.
Keywords: UAV; mobile laser scanning; LiDAR; photogrammetry; optical bathymetry; seamless DTM; DTM; elevation; river; Finland
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Flener, C.; Vaaja, M.; Jaakkola, A.; Krooks, A.; Kaartinen, H.; Kukko, A.; Kasvi, E.; Hyyppä, H.; Hyyppä, J.; Alho, P. Seamless Mapping of River Channels at High Resolution Using Mobile LiDAR and UAV-Photography. Remote Sens. 2013, 5, 6382-6407.
Flener C, Vaaja M, Jaakkola A, Krooks A, Kaartinen H, Kukko A, Kasvi E, Hyyppä H, Hyyppä J, Alho P. Seamless Mapping of River Channels at High Resolution Using Mobile LiDAR and UAV-Photography. Remote Sensing. 2013; 5(12):6382-6407.
Flener, Claude; Vaaja, Matti; Jaakkola, Anttoni; Krooks, Anssi; Kaartinen, Harri; Kukko, Antero; Kasvi, Elina; Hyyppä, Hannu; Hyyppä, Juha; Alho, Petteri. 2013. "Seamless Mapping of River Channels at High Resolution Using Mobile LiDAR and UAV-Photography." Remote Sens. 5, no. 12: 6382-6407.