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 "description": "<DIV STYLE=\"text-align:Left;font-size:12pt\"><DIV><DIV><P><SPAN>During July-September 2020, Cardinal Point Captains (CPC) hydrographers conducted hydrographic survey operations in three survey areas located on the western side of Bayfield Peninsula in southwestern Lake Superior. Survey operations took place over three legs: Leg 1 (7/25-8/5), Leg 2 (8/25-9/2), and Leg 3 (9/16-9/28). CPC utilized the Research Vessel (R/V) <\/SPAN><SPAN STYLE=\"font-style:italic;\"><SPAN>Echo<\/SPAN><\/SPAN><SPAN><SPAN>, which was equipped with a Teledyne-Reson SeaBat 7125 multibeam echosounder for simultaneously acquiring bathymetry and acoustic backscatter imagery. During survey operations, DEA provided remote technical support to assist CPC with vessel setup, system calibrations, and initial hydrographic data testing and quality control, and coordinated transfers of raw hydrographic data. <\/SPAN><\/SPAN><\/P><P><SPAN /><SPAN /><\/P><P STYLE=\"margin:0 0 0 0;\"><SPAN>After initial data assessments were complete, the raw multibeam data were prepared for import into CARIS Hydrographic Information Processing System (HIPS) software (version 11.3.8). Upon import into CARIS HIPS software, the raw multibeam data were converted from native Teledyne-Reson s7k file format into CARIS HDCS format. The converted multibeam data were stored logically by survey day. <\/SPAN><\/P><P STYLE=\"margin:0 0 0 0;\"><SPAN /><SPAN /><\/P><P STYLE=\"margin:0 0 0 0;\"><SPAN>After position, motion, waterline, and sound velocity corrections were applied, soundings were gridded for review and directed editing. Preliminary grid resolution was 2 meters (m). Review of bathymetric data was conducted by reviewing multiple bathymetry child layers (e.g. standard deviation, density) in CARIS HIPS and using editing and QC tools to view and edit erroneous soundings (\u201cfliers\u201d), systematic biases, timing errors, or alignment offsets. Upon completion of directed editing, soundings were gridded at 2m and interpolated using the  ArcGIS Focal Statistics tool for geospatial analysis. Slope was derived from this surface using the slope calculator, a function of ESRI's Spatial Analyst extension.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>",
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