OS43A-1996
Monitoring Change on Hydrothermal Edifices by Photogrammetric Time Series: Case Studies from the Endeavour Segment (Juan de Fuca Ridge)
Thursday, 17 December 2015
Poster Hall (Moscone South)
Tom Kwasnitschka, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Deborah S Kelley, University of Washington Seattle Campus, Seattle, WA, United States, Martin Heesemann, Ocean Networks Canada, Victoria, BC, Canada and Steven F Mihaly, University of Victoria, Victoria, BC, Canada
Abstract:
High-resolution photogrammetric surveys derived from ROV or AUV imagery yield seafloor geometry at centimeter resolution with full color texture while modeling overhangs and crevasses, generating vastly more detailed terrain models compared to most acoustic methods. The models furthermore serve as geographic reference frames for localized studies. Repetitive surveys consequently facilitate the precise, quantitative study of edifice buildup and erosion as well as the development of the biological habitat. We compare data gathered by the Ocean Networks Canada maintenance cruises with earlier surveys at two sites (Mothra, Main Endeavour Field) along the Endeavour Segment of the Juan de Fuca Ridge.
