Metadata: Identification_Information: Citation: Citation_Information: Originator: Peter A. Traykovski Publication_Date: 20220607 Title: Sidescan sonar bathymetry products at the Pea Island National Wildlife Refuge DUNEX Site, North Carolina in October 2021 Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9DPZZG2 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P9DPZZG2 Online_Linkage: https://www.sciencebase.gov/catalog/item/624f1795d34e21f82769a75b Larger_Work_Citation: Citation_Information: Originator: Jin-Si R. Over Originator: Christopher R. Sherwood Originator: Peter A. Traykovski Originator: Sandra M. Brosnahan Originator: Alex J. Olson Originator: Noa R. Randall Publication_Date: 2022 Title: DUNEX topographic, bathymetric, and supporting GPS data collected in Pea Island National Wildlife Refuge, North Carolina 2020-2021 Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data, tabular digital data, remote-sensing image Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9DPZZG2 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Over, J.R., Sherwood, C.R., Traykovski, P.A., Olson, A.J., Randall, N.R., and Brosnahan, S.M., 2022, DUNEX topographic, bathymetric, and supporting GPS data collected in Pea Island National Wildlife Refuge, North Carolina 2020-2021: U.S Geological Survey data release, https://doi.org/10.5066/P9DPZZG2. Online_Linkage: https://doi.org/10.5066/P9DPZZG2 Online_Linkage: https://www.sciencebase.gov/catalog/item/623dca6cd34e915b67d65110 Description: Abstract: The data in this section of the release characterizes the nearshore bathymetry collected in October 2021 by USGS and Woods Hole Oceanographic Institute (WHOI) scientists using a self-righting electric uncrewed surface vehicle with a sidescan sonar attached. Data collection occured at the USGS DUring Nearshore Event eXperiment (DUNEX) site on Pea Island National Wildlife Refuge (PINWR). DUNEX is a multi-agency, academic, and non-governmental organization collaborative community experiment designed to study nearshore coastal processes during storm events. USGS participation in DUNEX will contribute new measurements and models that will increase our understanding of storm impacts to coastal environments, including hazards to humans and infrastructure and changes in landscape and natural habitats. Collected data are part of field activity 2021-029-FA and are related to donated data 2020-024-DD, field activity 2021-028-FA and 2021-032-FA. Purpose: These data products resolve ripples at their highest resolution and provide a detailed look at the bathymetry at the Pea Island DUNEX site. Supplemental_Information: For more information about the data, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-024-DD and https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-029-FA. Bounding coordinates represent the maximum bounds of the rasters provided in this dataset. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20211020 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.47958791 East_Bounding_Coordinate: -75.47524654 North_Bounding_Coordinate: 35.68043940 South_Bounding_Coordinate: 35.67508477 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: DUNEX Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: remote sensing Theme_Keyword: sidescan sonar Theme_Keyword: bathymetry Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:624f1795d34e21f82769a75b Place: Place_Keyword_Thesaurus: Common geographic areas Place_Keyword: United States Place_Keyword: Pea Island Place_Keyword: Dare Place_Keyword: North Carolina Access_Constraints: None Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Please recognize the USGS as the source of this information. Not for navigational use. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jin-Si R. Over Contact_Organization: U.S. Geological Survey, Northeast Region: Woods Hole Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical address Address: U.S. Geological Survey City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2269 Contact_Electronic_Mail_Address: jover@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/624f1795d34e21f82769a75b?name=PINWR_sidescan_browse.JPG&allowOpen=true Browse_Graphic_File_Description: Example bathymetry data from the sidescan USV survey in Pea Island National Wildlife Refuge. Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Novatel Inertial Explorer (v. 8.70.8722), SonarWiz (v. 7.0), 3DSS Bathymetry Engine, gdal (v. 3.1.4) Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: All depth values are internally consistent in relation to each other and are comparable to values of published bathymetry in the area (e.g. 2022 USGS CoNED Topobathy DEM (1851 - 2020): Coastal Carolinas, available at https://www.fisheries.noaa.gov/inport/item/67013, accessed May 18, 2022). Logical_Consistency_Report: These grids represent sidescan bathymetry data collected by Peter Traykovski (WHOI). Two products, the bathymetry and amplitude returns, are provided. The bathymetry is given as raw returns and as an interpolated raster between the stripes of data. The amplitude data are given in 50 cm and 10 cm resolutions. Completeness_Report: Erroneous returns were removed in processing using software and hand editing routines, see processing steps for more detail. Gaps in the raw sounding data are from the USV making transects too far apart. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation information was acquired from the GNSS/IMU system in PPK mode and has a theoretical horizontal accuracy of 1 cm. The horizontal accuracy of the multibeam data was not verified, but in water depths of 15 meters or less, for 450 kHz transmit frequencies, reported multibeam accuracies are less than 1 meter and likely 30-50 centimeters (Ernsten and others, 2006). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Navigation information was acquired from the GNSS/IMU system in PPK mode and has a theoretical vertical accuracy of 1-cm and average reported vertical position error of 7.6 cm. The navigational accuracies do not represent the accuracy of the derived bathymetric soundings. The vertical accuracy of the multibeam data was not verified, but in water depths of 15 meters or less, for 450 kHz transmit frequencies, reported multibeam accuracies are less than 1-meter and likely 2-10 centimeters (Ernsten and others, 2006). Ernstsen, Verner B., Riko Noormets, Dierk Hebbeln, Alex Bartholomä, and Burg W. Flemming. "Precision of high-resolution multibeam echo sounding coupled with high-accuracy positioning in a shallow water coastal environment." Geo-marine letters 26, no. 3 (2006): 141-149. Lineage: Process_Step: Process_Description: Data collected with a PingDSP 3DSS-DX-450 bathymetric sidescan sensor attached to a uncrewed surface vehicle (USV) NeedleNose. Position and velocity data (GNSS/IMU) of the USV collected using a Novatel Hexagon IMU-IGM-A1 and FlexPak6-DS2 system in the USV and corrected to a JAVAD-Triumph-2 base station. USV controlled by Peter Traykovski. 1. The GNSS and IMU data are post-processed in Novatel Inertial Explorer. The IMU to GNSS offset is xyz 0.00, 0.022, and 0.384 (in meters). 2. The raw binary files pulled from the sidescan are processed in the PingDSP 3DSS-DX-Control software using the multibeam bathymetry engine (http://www.pingdsp.com/techMBES) to produce XTF sonar files. Raw data was smoothed over 10 samples and removed points above 1.5 m and below 20 m in MBES Mode. Sonar data was also processed in Point Cloud Mode to provide a higher resolution amplitude dataset. 3. XTF files were imported into SonarWiz to merge data with the GNSS/IMU information using the navinjectorPro utility. Data were filtered using the software’s Manufacturer Flag Filter, Range Filter, Cutoff Angle Filter, and Dynamic and Static Box Filter to remove points outside of the normal range or from poor returns. 4. Bathymetric sonar data processed in MBES Mode was exported from SonarWiz using trimmed mean output with default settings at 50 cm in NAD83/UTM Zone 18N and NAVD88 meters, using Geoid 12B, as a 32-bit GeoTIFF. A secondary bathymetry product was created using regularizedata3d by Jamal (2020), a cubic interpolation with the optimum smoothness coefficient determined by a Monte Carlo optimization procedure for the data regularization. Regularizedata3d entailed removing one cross-shore line of data from the processing and adjusting the smoothness parameter so the overall surface fit best fits the removed data. The process was then repeated for all the lines of data. The optimized smoothing parameter was used with all the data for the final processing to create a smoothed and interpolated 50 cm bathymetry grid. 5. Amplitude sonar data from MBES Mode was gridded at 50 cm resolution and exported from SonarWiz using mean output and default settings as a 32-bit GeoTIFF. The amplitude sonar data processed in Point Cloud Mode was gridded at 10 cm and exported from SonarWiz using mean output and default settings as a 32-bit GeoTIFF. Jamal (2020). RegularizeData3D (https://www.mathworks.com/matlabcentral/fileexchange/46223-regularizedata3d), MATLAB Central File Exchange. Retrieved September 23, 2020. Process_Date: 202204 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter A. Traykovski Contact_Organization: Woods Hole Oceanographic Institution Contact_Position: Associate Scientist Contact_Address: Address_Type: mailing and physical address Address: 226 Woods Hole Rd, MS #12 City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-289-2638 Contact_Electronic_Mail_Address: ptraykovski@whoi.edu Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -69.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 NRS 2011 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2021029FA_PINWR_DUNEX_Sidescan_bathymetry_50cm_1020.tif Entity_Type_Definition: A 50 cm raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded elevation values from sidescan sonar data collected on October 20, 2021 at the Pea Island National Wildlife Refuge DUNEX site. Entity_Type_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute: Attribute_Label: Value Attribute_Definition: Seafloor elevation relative to NAVD88 (m) using Geoid 12B Attribute_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -6.048 Range_Domain_Maximum: -2.361 Attribute_Units_of_Measure: meters Detailed_Description: Entity_Type: Entity_Type_Label: 2021029FA_PINWR_DUNEX_Sidescan_bathymetry_smoothed_50cm_1020.tif Entity_Type_Definition: A 50 cm raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with smoothed and interpolated encoded elevation values from sidescan sonar data collected on October 20, 2021 at the Pea Island National Wildlife Refuge DUNEX site. Entity_Type_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute: Attribute_Label: Value Attribute_Definition: Elevation relative to NAVD88 (m) using Geoid 2012B Attribute_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -5.827 Range_Domain_Maximum: -2.589 Attribute_Units_of_Measure: meters Detailed_Description: Entity_Type: Entity_Type_Label: 2021029FA_PINWR_DUNEX_Sidescan_amplitude_50cm_1020.tif Entity_Type_Definition: A 50 cm raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded amplitude values from sidescan sonar data collected on October 20, 2021 at the Pea Island National Wildlife Refuge Basnight Bridge site. Entity_Type_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute: Attribute_Label: Value Attribute_Definition: Amplitude of sidescan sonar returns Attribute_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 35.024 Range_Domain_Maximum: 42.213 Attribute_Units_of_Measure: relative units Detailed_Description: Entity_Type: Entity_Type_Label: 2021029FA_PINWR_DUNEX_Sidescan_amplitude_10cm_1020.tif Entity_Type_Definition: A 10 cm raster dataset (NAD83[2011]/UTM Zone 18N GeoTIFF) with encoded amplitude values from sidescan sonar data collected on October 20, 2021 at the Pea Island National Wildlife Refuge Basnight Bridge site. Entity_Type_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute: Attribute_Label: Value Attribute_Definition: Amplitude of sidescan sonar returns Attribute_Definition_Source: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 36.566 Range_Domain_Maximum: 42.368 Attribute_Units_of_Measure: relative units Overview_Description: Entity_and_Attribute_Overview: There are four multi-beam data grids. The no-data value is -3.402823E38. The naming convention is as follows: the USGS field ID 2021029FA; location is Pea Island National Wildlife Refuge (PINWR) at the DUNEX site; product is Sidescan bathymetry (smoothed or not) or amplitude data; resolution in centimeters; and date is in MMDD. Entity_and_Attribute_Detail_Citation: USGS Field Activity 2021-029-FA Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey-ScienceBase Contact_Address: Address_Type: mailing and physical Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: Each file represents a sidescan sonar data product from the Pea Island National Wildlife Refuge DUNEX site. Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF Format_Information_Content: Grids of sidescan sonar data collected by Peter Traykovski (WHOI) during field activity 2021-029-FA Transfer_Size: 21 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/624f1795d34e21f82769a75b Network_Resource_Name: https://www.sciencebase.gov/catalog/item/624f1795d34e21f82769a75b Network_Resource_Name: https://doi.org/10.5066/P9DPZZG2 Access_Instructions: The first link in the list above is to directly download all of the data into one zip file (the transfer size), the second link is to the page where you can download the topobathy individually, the third link is to the publication landing page. Fees: None. Technical_Prerequisites: These data are available as GeoTIFF rasters. To utilize these data, the user must have an image viewer, image processing, GIS software package capable of importing a GeoTIFF, and a way to unzip the raw data. Free spatial data viewers or proprietary software such as ArcGIS Earth or Google Earth Pro are capable of displaying the data. See: http://www.esri.com/software/arcgis-earth, or https://www.google.com/earth/desktop/. Metadata_Reference_Information: Metadata_Date: 20220607 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jin-Si R. Over Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical Address: U.S. Geological Survey Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2269 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with the USGS. Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998