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Low‐cost aerial photography for high‐resolution mapping of hydrothermal areas in Yellowstone National Park

Title data

Planer-Friedrich, Britta ; Becker, Juliane ; Brimer, Baas ; Merkel, Broder J.:
Low‐cost aerial photography for high‐resolution mapping of hydrothermal areas in Yellowstone National Park.
In: International Journal of Remote Sensing. Vol. 29 (2008) Issue 6 . - pp. 1781-1794.
ISSN 0143-1161
DOI: https://doi.org/10.1080/01431160701395237

Abstract in another language

A site-specific high-resolution aerial survey was conducted to map a status quo of two rapidly changing hydrothermal areas in Yellowstone National Park. A 2 m3 helium balloon released to 50–80 m altitude served as a low-cost platform easy to launch and retract on a highly flexible operating schedule. Pictures were taken with a digital camera with automatic interval shutter release. Owing to the balloon's sensitivity towards wind and the limited possibility of controlling its accurate positioning, the acquired aerial pictures varied significantly in altitude, tilt, and orientation. Automatic stitching was possible in areas where nearly vertical pictures with sufficient overlap existed. Those aerial pictures with little overlap or taken at a highly oblique angle had to be manually post-processed based on temporary marked ground control points and additional tie points (total time for processing: 10–14 days) to obtain a final mosaic with minimal distortion (0.4 m±0.3 m) and an absolute accuracy of approximately 0.5 m. Ground resolution was better than 2 cm. Vegetation and hydrothermal feature classification, biological and redox zonations, water contents of mud pots, gas activity in hot springs as well as subaquatic sedimentation fans and hydrothermal vents could be outlined, providing a highly detailed thermal inventory for future change detection.

Further data

Item Type: Article in a journal
Refereed: No
Additional notes: BAYCEER80741
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Environmental Geochemistry Group
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Environmental Geochemistry Group > Professorship Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 05 May 2015 12:10
Last Modified: 05 May 2015 12:10
URI: https://eref.uni-bayreuth.de/id/eprint/12828