64386 Bayfield2020_bathymetry1m m9267 Data Set Published / External 47844 DEMs Project Completed In July-September 2020, a hydrographic survey was conducted 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). The survey platform was the Research Vessel (R/V) Echo, which was equipped with a Teledyne-Reson SeaBat 7125 multibeam echosounder for simultaneously acquiring bathymetry and acoustic backscatter imagery. Multibeam bathymetry (1 meter grid resolution) from 2020 hydrographic survey of western Bayfield Peninsula in Lake Superior Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Theme ISO 19115 Topic Category environment Theme ISO 19115 Topic Category inlandWaters Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > SEA FLOOR Theme Great Lakes Theme Lake Superior Theme multibeam Instrument Global Change Master Directory (GCMD) Instrument Keywords Earth Remote Sensing Instruments > Active Remote Sensing > Profilers/Sounders > Acoustic Sounders > ECHO SOUNDERS Platform Global Change Master Directory (GCMD) Platform Keywords In Situ Ocean-based Platforms > SHIPS > R/V Echo Office for Coastal Management Charleston SC Data Set Elevation None Planned raster digital data Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners NOAA/OCM; Dave Evans and Associates Data Steward 2021 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2021 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2021 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2021 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -91.201383 -90.970578 46.978095 46.850024 Range 2020-07-25 2020-08-05 First leg Range 2020-08-25 2020-09-02 Second Leg Range 2020-09-16 2020-09-28 Third Leg 2 Meter 2 Point Yes Row 18023 Length 1 Meter Projected EPSG:6344 NAD83(2011) / UTM zone 15N NAD83 (National Spatial Reference System 2011) GRS 1980 6378137 298.257222101 NAD83(2011) UTM zone 15N Transverse Mercator Latitude of natural origin 0° 0' 0" N Longitude of natural origin 93° 0' 0" W Scale factor at natural origin 0.9996 False easting 500000 metre False northing 0 metre 1 Easting E metre east 2 Northing N metre north Vertical EPSG:5703 NAVD88 height North American Vertical Datum 1988 1 Gravity-related height H metre up Unclassified Data is available online for bulk or custom downloads None Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9267/details/9267 2021 Organization NOAA Office for Coastal Management Customized Download Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base. Zip Zip https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/WI_Bayfield_Multibeam_Bathy_2020_9267/index.html 2021 Organization NOAA Office for Coastal Management Bulk Download Bulk download of data files in the original coordinate system. https://coast.noaa.gov/ NOAA's Office for Coastal Management (OCM) website Online Resource HTML Information on the NOAA Office for Coastal Management (OCM) https://coast.noaa.gov/dataviewer/ NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) Online Resource HTML The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/WI_Bayfield_Multibeam_Bathy_2020_9267/20201116_NOAA_OCM_Bayfield_Peninsula_Hydrographic_Data_Processing_Report.pdf Processing report Online Resource pdf Contractor report Uncertainty is calculated for each point in the bag file. The mean uncertainty was 2.7 cm with a standard deviation of 3.3 cm. Raw Multibeam soundings Organization David Evans and Associates Originator 1 A hydrographic survey was conducted 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). The survey platform was the Research Vessel (R/V) Echo, which was equipped with a Teledyne-Reson SeaBat 7125 multibeam echosounder for simultaneously acquiring bathymetry and acoustic backscatter imagery. 2020-09-28T00:00:00 2 Bathymetry data were processed in CARIS HIPS (v11.3.8). 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. Soundings with a Reson quality flag of 0 or 1 (indicating poor brightness and/or collinearity of data) were rejected automatically on import. These soundings were reviewed later during manual inspection. A CARIS HIPS Vessel File (HVF), which stored sensor offsets for the survey vessel, was constructed using values for the Echo as provided and documented by CPC hydrographers. Multibeam patch test data (conducted 7/25/2020) were analyzed and alignment corrections were calculated and applied to soundings. Vessel attitude (heading, pitch, roll, heave) and position data (global navigation satellite system (GNSS) corrections) were manually reviewed and verified. Applanix POSPac software was used to calculate Smoothed Best Estimate of Trajectory (SBET) files, which combined the vessel attitude and position data to produce a corrected horizontal position solution and to extract ellipsoidally referenced heights. Raw Multibeam soundings 3 Soundings were converted from ellipsoid heights (North American Datum of 1983; NAD83) to the project vertical datum (North American Vertical Datum of 1988; NAVD88) in CARIS HIPS using the GEOID12B model. Sound speed profiles were incorporated to correct multibeam slant range measurements and compensate for refraction in the water column. Sound speed profiles were imported into CARIS HIPS and applied to soundings using the “closest in distance and time” function. Static draft measurements were conducted periodically during hydrographic survey operations. Draft measurements were used to compute Global Positioning System (GPS) tides relative to the ellipsoid and to obtain an approximate waterline for the application of sound speed profiles. 4 After position, motion, waterline, and sound velocity corrections were applied, soundings were gridded for review and directed editing. 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 (“fliers”), systematic biases, timing errors, or alignment offsets. After the completion of bathymetric data processing, review, and analysis, soundings were gridded using a standard swath angle filter to produce bathymetric surfaces. Bathymetry data were gridded at 2m. Interpolation was applied to fill small gaps. The BAG format contains two data layers: Depth and Uncertainty (standard deviation of depth). Bathymetry products are referenced to NAD83 Universal Transverse Mercator (UTM) Zone 15 North with horizontal units in meters and vertical elevation in meters relative to NAVD88. 5 NOAA Office for Coastal Management ingested GeoTiff versions of the grid into the Data Access Viewer. The GeoTiff version is the elevation band of the BAG file. The bag file is available through the bulk download. 2021-03-17T00:00:00 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource 64513 Data Set Cross Reference Backscatter from the same collection gov.noaa.nmfs.inport:64386 Kirk Waters 2021-03-17T18:18:36 Kirk Waters 2024-01-10T19:14:18 2024-01-10 Office for Coastal Management OCM 1002 Public No No 2021-03-17 1 Year 2022-03-17