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The benthoscape map was produced using an unsupervised classification process (see below) with a 71% accuracy in classification according to in situ groundtruthed data. |
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The benthoscape map was produced using an unsupervised classification process (see below) with a 71% accuracy in classification according to in situ groundtruthed data. |
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Wilson, B.R., Brown, C.J., Sameoto, J.A., Lacharite, M., Redden, A. (2021).
Mapping seafloor habitats in the Bay of Fundy to assess macrofaunal assemblages associated with Modiolus modiolus beds. Estuarine, Coastal and Shelf Science, 252.
https://doi.org/10.1016/j.ecss.2021.107294 |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Classifications include: </SPAN></P><P><SPAN>- Tidal Scoured Mixed Sediments (Glacial till - boulders or cobble with high roundness and low angularity)</SPAN></P><P><SPAN>- Mixed Sediments (Glacial Till - < 50% boulders or bedrock with mixed sediments of cobble, gravel and sand) </SPAN></P><P><SPAN>- Gravelly Sand (Sand with 5–30% gravel)</SPAN></P><P><SPAN>- Sand (> 90% Sand)</SPAN></P><P><SPAN>- Silty Gravel with Anemones (> 50% gravel with silt and Anemones)</SPAN></P><P><SPAN>- Silt (> 90% Silt) and Bedrock and Boulders (> 50% bedrock or boulders).</SPAN></P><P><SPAN>Unsupervised classification process is as follows:</SPAN></P><P><SPAN>1. Image objects were produced using eCognition software (segmentation layer found in the UnsupervisedClassification_shapefiles/Segmentation_eCognition) using bathymetry and backscatter only.</SPAN></P><P><SPAN>2. Fuzzy c-means algorithm was applied (using PPCLUST package in R) to the segmentation layer and environmental variables to get acoutic classes (#1-14 - number of clusters were optimized at 14). </SPAN></P><P><SPAN>3. Bottom types from in-situ video were classified using a benthoscape classification method. 10 images at 10 meter intervals from each station were extracted and analysed.</SPAN></P><P><SPAN>4. Benthoscape classes from groundtruthed video data were then matched to the acoustic classes in an error matrix. </SPAN></P></DIV></DIV></DIV> |
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BoF_Benthoscape |
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["Bay of Fundy Benthoscape","2021"] |
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en-US |
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150000000 |
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