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- W2509220979 abstract "The imaging of acoustic data in 3D is an effective tool for examining school distributions and behavior and to enhance coastal fisheries. For this purpose, we propose the combined use of sonar information and GIS techniques. The acoustic data for the present study were collected in November 2000 and July 2001 from a coastal area in the southern Japan Sea. A sector-scanning sonar was used to observe the distribution of fish schools. Computer based sonar images were created and a binarization method was used to define schools and school area. A 3D GIS was used to demonstrate the spatial distribution of the schools on a three dimensional map. The 3D view can provide an animated image for us. This image of fish schools could be easily observed from different points of view. From the visualization, it was found that (1) the distribution of schools was concentrated around a sea hill and an artificial reef, (2) about 56% of the fish schools are distributed in the layer upper 20m of the water column, (3) the number of school images was 344 on the starboard side, 129 on the port side, and 119 below the ship. The combined use of sonar information and GIS spatial analysis has provided a significant step in determining the real features of schools in the waters." @default.
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- W2509220979 date "2005-01-01" @default.
- W2509220979 modified "2023-09-27" @default.
- W2509220979 title "The three-dimensional GIS using sonar information for coastal fisheries" @default.
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