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Golden Software's Mapping Software Lineup Put To The Test

Users often combine Golden Software's mapping and griding software products to produce their final project. In the summer of 2007, a study was conducted by Dr. Richard Crawford of the Prince William Sound Science Center (PWSSC) in conjunction with the Valdez Fisheries Development Association to develop a tool to enhance the evaluation of fish abundance with their commercial-grade echo sounders. The goal was to maximize the harvesting of brood stock at the Solomon Gulch Hatchery. For their analysis, PWSSC used a combination of Surfer, Voxler, and Grapher to complete the study of Enhancing in-house assessment of pink salmon returns at Solomon Gulch Hatchery in Alaska. See the full report for additional information.

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Prince William Science Center, located in Cordova, Alaska.

As Richard describes, “We explored the use of three-dimensional modeling for studying fish distribution and behavior at the Solomon Gulch Hatchery in Prince William Sound by combining traditional fisheries acoustics techniques with the novel use of Geographic Information System (GIS) modeling and graphical visualization. The goal was to gather information to help optimize escapement for brood stock while maximizing the opportunity for harvesting the surplus for cost recovery and the open fishery. Golden Software products Surfer, Voxler and Grapher were perfect for the task.”

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Isosurfaces were created in Voxler to display the
volume visualization for the schools of fish. This allows the true
shape of the fish schools to be displayed.

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A Voxler image reflecting the fish
distribution along a bathymetric feature.

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A 3D surface in Surfer, displaying the study area showing
the East and West schools of fish concentrated along the
shelf break (light and dark blue patches).

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Surfer contour and base map overlays showing the main bodies of fish
at the West School (left) and East School (right).


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A Grapher bar chart and line graphs display a
modeled distribution of the schools of fish.

 

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Wednesday, 22 November 2017

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