Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments
Science, resource management, and defense need algorithms capable of using airborne or satellite imagery to accurately map bathymetry, water quality, and substrate composition in optically shallow waters. Although a variety of inversion algorithms are available, there has been limited assessment of...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal Article |
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American Society of Limnology and Oceanography
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/49263 |
| _version_ | 1848758201861799936 |
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| author | Dekker, A. Phinn, S. Anstee, J. Bissett, P. Brando, V. Casey, B. Fearns, Peter Hedley, J. Klonowski, Wojciech Lee, Z. Lynch, Mervyn Lyons, M. Mobley, C. Roelfsema, C. |
| author_facet | Dekker, A. Phinn, S. Anstee, J. Bissett, P. Brando, V. Casey, B. Fearns, Peter Hedley, J. Klonowski, Wojciech Lee, Z. Lynch, Mervyn Lyons, M. Mobley, C. Roelfsema, C. |
| author_sort | Dekker, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Science, resource management, and defense need algorithms capable of using airborne or satellite imagery to accurately map bathymetry, water quality, and substrate composition in optically shallow waters. Although a variety of inversion algorithms are available, there has been limited assessment of performance and no work has been published comparing their accuracy and efficiency. This paper compares the absolute and relative accuracies and computational efficiencies of one empirical and five radiative-transfer-based published approaches applied to coastal sites at Lee Stocking Island in the Bahamas and Moreton Bay in eastern Australia. These sites have published airborne hyperspectral data and field data. The assessment showed that (1) radiative-transfer—based methods were more accurate than the empirical approach for bathymetric retrieval, and the accuracies and processing times were inversely related to the complexity of the models used; (2) all inversion methods provided moderately accurate retrievals of bathymetry, water column inherent optical properties, and benthic reflectance in waters less than 13 m deep with homogeneous to heterogeneous benthic/ substrate covers; (3) slightly higher accuracy retrievals were obtained from locally parameterized methods; and (4) no method compared here can be considered optimal for all situations. The results provide a guide to the conditions where each approach may be used (available image and field data and processing capability). A re-analysis of these same or additional sites with satellite hyperspectral data with lower spatial and radiometric resolution, but higher temporal resolution would be instructive to establish guidelines for repeatable regional to global scale shallow water mapping approaches. |
| first_indexed | 2025-11-14T09:40:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-49263 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:40:14Z |
| publishDate | 2011 |
| publisher | American Society of Limnology and Oceanography |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-492632017-09-21T00:28:32Z Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments Dekker, A. Phinn, S. Anstee, J. Bissett, P. Brando, V. Casey, B. Fearns, Peter Hedley, J. Klonowski, Wojciech Lee, Z. Lynch, Mervyn Lyons, M. Mobley, C. Roelfsema, C. Science, resource management, and defense need algorithms capable of using airborne or satellite imagery to accurately map bathymetry, water quality, and substrate composition in optically shallow waters. Although a variety of inversion algorithms are available, there has been limited assessment of performance and no work has been published comparing their accuracy and efficiency. This paper compares the absolute and relative accuracies and computational efficiencies of one empirical and five radiative-transfer-based published approaches applied to coastal sites at Lee Stocking Island in the Bahamas and Moreton Bay in eastern Australia. These sites have published airborne hyperspectral data and field data. The assessment showed that (1) radiative-transfer—based methods were more accurate than the empirical approach for bathymetric retrieval, and the accuracies and processing times were inversely related to the complexity of the models used; (2) all inversion methods provided moderately accurate retrievals of bathymetry, water column inherent optical properties, and benthic reflectance in waters less than 13 m deep with homogeneous to heterogeneous benthic/ substrate covers; (3) slightly higher accuracy retrievals were obtained from locally parameterized methods; and (4) no method compared here can be considered optimal for all situations. The results provide a guide to the conditions where each approach may be used (available image and field data and processing capability). A re-analysis of these same or additional sites with satellite hyperspectral data with lower spatial and radiometric resolution, but higher temporal resolution would be instructive to establish guidelines for repeatable regional to global scale shallow water mapping approaches. 2011 Journal Article http://hdl.handle.net/20.500.11937/49263 10.4319/lom.2011.9.396 American Society of Limnology and Oceanography unknown |
| spellingShingle | Dekker, A. Phinn, S. Anstee, J. Bissett, P. Brando, V. Casey, B. Fearns, Peter Hedley, J. Klonowski, Wojciech Lee, Z. Lynch, Mervyn Lyons, M. Mobley, C. Roelfsema, C. Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments |
| title | Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments |
| title_full | Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments |
| title_fullStr | Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments |
| title_full_unstemmed | Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments |
| title_short | Intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in Australian and Caribbean coastal environments |
| title_sort | intercomparison of shallow water bathymetry, hydro-optics, and benthos mapping techniques in australian and caribbean coastal environments |
| url | http://hdl.handle.net/20.500.11937/49263 |