Using Multi-Angle WorldView-2 Imagery to Determine Ocean Depth Near Oahu, Hawaii
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Authors
Lee, Krista R.
Subjects
WorldView-2
Multispectral Imagery
Shallow Water Bathymetry
Depth Determination
Multi-Angle Remote Sensing
Multispectral Imagery
Shallow Water Bathymetry
Depth Determination
Multi-Angle Remote Sensing
Advisors
Olsen, Richard C.
Date of Issue
2012-09
Date
Sep-12
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Multispectral imaging (MSI) data collected at multiple angles over shallow water provide analysts with a unique perspective of bathymetry in coastal areas. Observations taken by DigitalGlobes WorldView-2 (WV-2) sensor acquired at 39 different view angles on 30 July 2011 were used to determine the effect of acquisition angle on derived depth. The site used for this study was on the island of Oahu, focused on Kailua Bay (on the windward side of the island). Satellite azimuth and elevation for these data ranged from 18.8 to 185.8 degrees and 24.9 (forward-looking) to 24.5 (backward-looking) degrees (respectively) with 90 degrees representing a nadir view. Bathymetry were derived directly from the WV-2 radiance data using a band ratio approach. Comparison of results to LiDAR-derived bathymetry showed that varying view angle impact the quality of the inferred bathymetry. Derived and reference bathymetry have a higher correlation as images are acquired closer to nadir. The band combination utilized for depth derivation also has an effect on derived bathymetry. Four band combinations were compared, and the Blue and Green combination provided the best results.
Type
Thesis
Description
Series/Report No
Department
Remote Sensing Intelligence
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.