| Title | Scaling of interpretation with OBIA with backscatter data |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Le Bas, T P |
| Source | Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada; by Todd, B J ; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; Geological Survey of Canada, Open File 8295, 2017 p. 75, https://doi.org/10.4095/305883  Open Access |
| Links | GeoHab 2017
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| Year | 2017 |
| Publisher | Natural Resources Canada |
| Meeting | 2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; May 1-4, 2017 |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Program and abstracts: 2017
GeoHab Conference, Dartmouth, Nova Scotia, Canada |
| File format | pdf |
| Subjects | marine geology; surficial geology/geomorphology; environmental geology; geophysics; mapping techniques; oceanography; marine environments; coastal studies; conservation; marine organisms; marine
ecology; resource management; biological communities; environmental studies; ecosystems; geophysical surveys; acoustic surveys, marine; sonar surveys; side-scan sonar; bathymetry; geophysical interpretations; submarine features; reefs; statistical
methods; Biology; Data processing |
| Illustrations | sketch maps |
| Program | Offshore Geoscience |
| Released | 2017 09 26 |
| Abstract | Multibeam Echosounder systems provide two datasets: a bathymetry grid and backscatter imagery. These can be combined together to produce an interpretation of these data using OBIA. The resulting
interpretation divides the data into classes of similar attributes. However the question is what scale of interpretation is appropriate for the data and how does the scale of the data processing affect the results? Are the features that are extracted
dependent on the processing resolution and the particular OBIA parameters?
Bathymetry and backscatter processing can be relatively automated and only have minor subjective input from the user, such as editing of outlier depths or removal of cross
lines of backscatter, together with the resolution and level of smoothing.
Data will be presented at a variety of resolutions and with a variety of OBIA variables. The results will be compared to show whether the OBIA can distinguish seafloor
features in the same manner as the human eye, for example to interpret either individual corals at high resolution or fields of coral at low resolution. Two sets of data will be showcased, one from shipboard multibeam over coral reefs (figure below)
and one from an AUV multibeam and sidescan over rocky reef. It must be remembered however that OBIA will initially only classify areas has having similar "look" statistically, and not provide habitat identification or classification. |
| Summary | (Plain Language Summary, not published)
The sixteenth annual GeoHab Conference was held this year (2017) at the Waterfront Campus of the Nova Scotia Community College in Dartmouth, Nova Scotia,
Canada. |
| GEOSCAN ID | 305883 |
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