Metadata: Identification_Information: Citation: Citation_Information: Originator: Christopher C. Bemelmans Originator: Chelsea A. Stalk Originator: Daniel J. Ciarletta Originator: Jennifer L. Miselis Publication_Date: 20250513 Title: Coastal Multibeam Bathymetry and Backscatter Data Collected in June 2024 From Wallops and Assawoman Islands, Virginia Geospatial_Data_Presentation_Form: tabular digital data, raster digital data Larger_Work_Citation: Citation_Information: Originator: Christopher C. Bemelmans Originator: Chelsea A. Stalk Originator: Daniel J. Ciarletta Originator: Jennifer L. Miselis Publication_Date: 20250513 Title: Coastal Multibeam Bathymetry and Backscatter Data Collected in June 2024 From Wallops and Assawoman Islands, Virginia Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P14SGUMT Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P14SGUMT Description: Abstract: The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) collected multibeam echosounder (MBES) bathymetry and sonar backscatter data offshore of Wallops and Assawoman Islands, Virginia in June 2024. This USGS data release includes the corresponding processed MBES-derived elevation points (xyz) and a backscatter mosaic (tag image file format [TIFF]) as part of Field Activity Number (FAN) 2024-310-FA. MBES and backscatter data were acquired using two Teledyne Reason SeaBat T50-P MBES in a dual-head configuration. Additionally, nearshore single-beam echosounder (SBES) and land topographic elevations, as well as Chirp seismic data, were concurrently collected as a part of FAN 2024-310-FA; those data are available as separate data releases (Lyons and others, 2025; Forde and others, 2025). Purpose: The purpose of the survey was to map the shoreface morphology of Wallops and Assawoman Islands. These data may be used for assessment of coastal resiliency, erosion hazards, and (or) long-term landscape change. Data were collected during USGS Field Activity Number (FAN) 2024-310-FA. Additional survey and data details are available from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/services/activity.php?fan=2024-310-FA. Supplemental_Information: The processed sonar-derived elevation data are provided as American Standard Code for Information Interchange (ASCII) x,y,z point data files. These values are not the individual soundings, but nodes from a 1meter (m) bathymetric grid. The Z value for the node is generated by utilizing a Combined Uncertainty and Bathymetry Estimator (CUBE) surface and has an estimated total value of uncertainty (Calder and Wells, 2007). The bathymetry data were collected and processed in the World Geodetic System of 1984 (WGS84) (G2139 realization) horizontal and vertical datums, and were subsequently transformed using the National Oceanic and Atmospheric Administration's (NOAA) VDatum version 4.7 (v.4.7) transformation software (https://vdatum.noaa.gov/). The XYZ data are provided in: (1) Universal Transverse Mercator World Geodetic System 1984 (UTM-WGS84) in meters for the horizontal and WGS84 ellipsoidal height in meters for the vertical; and (2) Virginia State Plane Coordinate System 1983 (SPCS83) Federal Information Processing Standard (FIPS) 4502 in U.S. survey feet (ft) for the horizontal and North American Vertical Datum 1988 (NAVD88) in U.S. survey feet with respect to GEOID18 for the vertical. Processed backscatter intensity data are provided as a geographic tagged image file format (geoTIFF) raster image mosaic. Raster values represent mean intensity returns as derived from a 1-m grid with nodes that correspond with the bathymetry grid. Intensity values for each node are likewise generated by using a CUBE surface. The raster is provided in (1) Universal Transverse Mercator World Geodetic System 1984 (UTM-WGS84) and (2) Virginia State Plane Coordinate System 1983 (SPCS83) Federal Information Processing Standard (FIPS) 4502 in U.S. survey feet. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20240601 Ending_Date: 20240613 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.70780953 East_Bounding_Coordinate: -75.33577660 North_Bounding_Coordinate: 37.89907796 South_Bounding_Coordinate: 37.73719362 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:53fbb1e8-ff3f-40d6-9be1-408d94a6edee Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: elevation Theme_Keyword: location Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: marine geology Theme_Keyword: marine geophysics Theme_Keyword: geophysics Theme_Keyword: bathymetry Theme_Keyword: multibeam sonar Theme_Keyword: ocean characteristics Theme_Keyword: ocean processes Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: hydrography Theme_Keyword: seafloor mapping Theme_Keyword: Teledyne Reson T50-P Theme_Keyword: Applanix POS MV Wavemaster II Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: St. Petersburg Coastal and Marine Science Center Theme_Keyword: SPCMSC Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: State of Virginia Place_Keyword: Wallops Island Place: Place_Keyword_Thesaurus: None Place_Keyword: Wallops Island, Virginia Place_Keyword: Mid-Atlantic Coast Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: June 2024 Access_Constraints: No access constraints. Please see 'Distribution Information' for details. Use_Constraints: These data are marked with a Creative Common CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Christopher C. Bemelmans Contact_Organization: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Contact_Position: Electronics Technician (Marine Instrumentation) Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8062 Contact_Electronic_Mail_Address: cbemelmans@usgs.gov Data_Set_Credit: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center Native_Data_Set_Environment: Microsoft Windows 11 Enterprise (Build 19045.4046); NOAA VDatum (version 4.7); HYPACK®, A Xylem Brand and HYPACK HYSWEEP® (version 2023 Q3); Applanix POSPac MMS (POSPac) software (version 9.1, Service Pack 1); Qimera® (version 2.6.2); Fledermaus Geocoder Toolbox (FMGT) (version 7.11.0) Cross_Reference: Citation_Information: Originator: International Hydrographic Organization (IHO) Publication_Date: 20191031 Title: The IHO-IOC GEBCO Cook Book Publication_Information: Publication_Place: Monaco Publisher: International Hydrographic Organization, Intergovernmental Oceanographic Commission Other_Citation_Details: pages 81-83 Online_Linkage: https://www.gebco.net/data_and_products/gebco_cook_book/ Cross_Reference: Citation_Information: Originator: QPS Publication_Date: 20210101 Title: Qimera Training Manual Publication_Information: Publication_Place: Zeist, Netherlands Publisher: QPS Other_Citation_Details: pages 1-473 Cross_Reference: Citation_Information: Originator: Jonathan Beaudoin Originator: Weston Renoud Originator: Tannaz H. Mohammadloo Originator: M. Snellen Publication_Date: 2018 Title: Automated Correction of Refraction Residuals Publication_Information: Publication_Place: Sydney, Australia Publisher: HYDRO18 Conference Other_Citation_Details: pages 1-16 Online_Linkage: https://resolver.tudelft.nl/uuid:17c45da0-a0df-4fee-b419-e6f7b24c8754 Cross_Reference: Citation_Information: Originator: Dr. Bruno Scherzinger Originator: Joe Hutton Publication_Date: 2025 Title: Applanix IN-Fusion+™: the Ultimate Solution for Enhanced Spatial Intelligence Publication_Information: Publication_Place: Westminster, Colorado Publisher: Trimble Other_Citation_Details: pages 1-9 Online_Linkage: https://applanix.trimble.com/en/resources/flipbooks/applanix-in-fusion-plus-the-ultimate-solution-for-enhanced-spatial Cross_Reference: Citation_Information: Originator: Brian R. Calder Originator: David E. Wells Publication_Date: 20070129 Title: CUBE User's Manual Publication_Information: Publication_Place: Durham, NH Publisher: University of New Hampshire, Center for Coastal and Ocean Mapping Other_Citation_Details: pages 1-54 Online_Linkage: https://scholars.unh.edu/ccom/1217 Cross_Reference: Citation_Information: Originator: International Hydrographic Organization (IHO) Publication_Date: 200802 Title: IHO Standards for Hydrographic Surveys Publication_Information: Publication_Place: Principaute de Monaco Publisher: International Hydrographic Bureau Other_Citation_Details: pages 1-28 Online_Linkage: https://iho.int/uploads/user/pubs/standards/s-44/S-44_5E.pdf Cross_Reference: Citation_Information: Originator: Erin O. Lyons Originator: Julie C. Bernier Originator: Sydney K. Nick Originator: Daniel J. Ciarletta Originator: Jennifer L. Miselis Publication_Date: 20250513 Title: Coastal Single-Beam Bathymetry and Beach Elevation Data Collected in 2024 From Wallops and Assawoman Islands, Virginia Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P1HFYGE6 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P1HFYGE6 Cross_Reference: Citation_Information: Originator: Arnell S. Forde Originator: Chelsea A. Stalk Originator: Daniel J. Ciarletta Originator: Jennifer L. Miselis Publication_Date: 20250318 Title: Chirp Sub-Bottom Profile Geophysical Data Collected in 2024 From Wallops Island and Assawoman Island, Virginia Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P1NZ6CC2 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P1NZ6CC2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This dataset was from a single research cruise with exact instrumentation and set up and is therefore internally consistent. Methods were employed to maintain data collection consistency aboard the platform. During mobilization, each piece of equipment was isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements were recorded manually and digitally entered into their respective programs. Logical_Consistency_Report: These files represent the post-processed bathymetric data (x,y,z) during a multibeam bathymetry survey. Completeness_Report: These are complete post-processed x,y,z bathymetric data points from multibeam data collected nearshore Wallops and Assawoman Islands, Virginia, June, 2024. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: All data were collected and processed to meet or exceed International Hydrographic Organization (IHO) Special Order standards for positioning and depth (IHO, 2008). CUBE Uncertainty values associated with each node are available in the x,y,z file, with a mean value of 0.05 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: All data were collected and processed to meet or exceed IHO Special Order standards for positioning and depth (IHO, 2008). CUBE Uncertainty values associated with each node are available in the x,y,z file, with a mean value of 0.05 m. Data transformed using VDatum have an additional reported vertical transformation error of 3.70237 centimeters (cm) or 0.1214686 US survey ft. Lineage: Process_Step: Process_Description: Acquisition: An Ellipsoidally Referenced Survey (ERS) consisting of multibeam bathymetry was conducted using two Teledyne Reson SeaBat T50-P multibeam echosounders, in dual-head configuration. The pair of Mills Cross (configuration) transmit and receive arrays, were placed side-by-side within a bracket that oriented them at opposing 30-degree angles (relative to horizontal). The bracket was pole-mounted on the starboard gunnel of the Research Vessel (R/V) Sallenger, a 26-foot fiberglass vessel. The sonar arrays were oriented athwartships (primary and secondary arrays facing outward and down to port and starboard, respectively) and located approximately 1-m below the waterline when deployed. An Applanix Pos MV Wavemaster II V5 inertially aided navigation system was used for timing, positioning, and attitude. The Inertial Measurement Unit (IMU) was mounted atop the sonar bracket just aft of the pole. Two Trimble GA830 Global Navigation Satellite System (GNSS) antennas were affixed atop the cabin approximately amidships of the vessel, two meters apart, port-starboard. An AML Oceanographic Micro-X sound velocity sensor was used for speed of sound readings at the sonar head. A Sontek CastAway CTD was used for measuring sound velocity profiles. Hydrographic survey acquisition and processing software, HYPACK® and HYPACK HYSWEEP® (version 2023 Q3) managed data inputs from sensors and produced two files (.RAW and .HSX). Data were collected in WGS84 (G2139) Universal Transverse Mercator (UTM) Zone 18 North (18N) coordinates. Process_Date: 20240613 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Christopher C. Bemelmans Contact_Organization: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8062 Contact_Electronic_Mail_Address: cbemelmans@usgs.gov Process_Step: Process_Description: Processing: Positioning and attitude data were post-processed in Applanix POSPac MMS (POSPac) software version 9.1 Service Pack 1. Raw position files were imported into POSPac and processed with the IN-Fusion PP-RTX processing mode utilizing Trimble CenterPoint RTX technology (Scherzinger and Hutton, 2025), creating smoothed best estimate of trajectory (SBET) files and dynamic error files (SMRMSG) for each day of the survey. Bathymetric data were post-processed in Qimera® Hydrographic processing software version 2.6.2. HYPACK® acquisition files (.HSX) were first imported into Qimera® and then post-processed navigation files (SBET and SMRMSG) were imported and applied. Additionally, Global Positioning System (GPS) tide (GPS tidal corrections utilize GPS height information from real time survey observations to obtain an ellipsoid height) was computed and sound velocity profiles were applied (IHO, 2019). Roll calibration was also performed, as necessary, and values were applied to the data (QPS, 2021). CUBE Uncertainty “layer reflects the standard deviation, scaled to 95% confidence level, of the accepted soundings that contributed to the selected hypothesis.” (QPS, 2021). Data were filtered to exclude any points with RESON Quality flags of 0, 1, and 2 (these flags are assigned to individual soundings at the time of acquisition and are a metric of pass/fail in regard to both brightness and collinearity: 0 = fail both, 1 = pass brightness only, 2 = pass collinearity only), as well as soundings that had a Total Propagated Uncertainty (TPU) greater than stated IHO Special Order standards (IHO, 2008). Refraction artifacts were addressed automatically using the Technical University of Delft (TU Delft) sound-speed inversion tool (Beaudoin and others, 2018) and manually using the Refraction Editor filter. Further manual editing of data points that deviated significantly from the surrounding surface was performed in Slice Editor (QPS, 2021) and a 1-m bathymetric CUBE surface was computed (Calder and Wells, 2007). Small gaps in the continuous surface were caused by limitations in swath width and planned line navigation within shallow waters. Large data gaps in the southern portion of the survey were the result of a 65-degree beam angle filter applied to this section to remove erroneous data. The final surface was exported as an x,y,z ASCII file using the Dynamic CUBE Surface to ASCII function. Process_Date: 2024 Source_Produced_Citation_Abbreviation: 2024-310-FA_MBES_Wallops_1m_WGS84_UTM18N.xyz Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Christopher C. Bemelmans Contact_Organization: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8062 Contact_Electronic_Mail_Address: cbemelmans@usgs.gov Process_Step: Process_Description: Backscatter Mosaic Creation: Acoustic Intensity Backscatter data were extracted from HSX files in Qimera® Hydrographic processing software version 2.6.2. The final CUBE bathymetry surface serves as input for geometric corrections, and average temperature and salinity data (derived from the Sontek CastAway CTD measurements taken during acquisition) are utilized by the program to calculate local absorption and transmission loss. GSF files were exported from Qimera® and imported into FMGT for backscatter mosaic creation. These inputs, along with the following settings were entered into FMGT, and then processing was initiated [Weighted Average = blending, image type = beam average, weighting = swath, and an Angle-Varying gain = 200]. During processing, the tool automatically creates a pattern file (.bbp) which is used to correct for variations in the beam pattern of the system (QPS, 2021). Upon completion, a 1-m backscatter mosaic with intensity values ranging from 9.6875 to -65.625 dB (decibels) was created, and the mosaic was exported as a 32-bit floating point GeoTIFF (.tiff) using the 'Export Floating Point GeoTIFF' function. Process_Date: 2024 Source_Produced_Citation_Abbreviation: 2024-310-FA_Wallops_MBES_1m_Backscatter.tiff Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Christopher C. Bemelmans Contact_Organization: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8062 Contact_Electronic_Mail_Address: cbemelmans@usgs.gov Process_Step: Process_Description: Datum Transformation: Final x,y,z data were converted using NOAA's VDatum v.4.7 software conversion tool from the WGS84 [G2139] realization, in meters, to NAD83 [2011] Virginia South State Plane Coordinate System NAVD88, in US survey feet, using the GEOID18 model (orthometric height). Process_Date: 2025 Source_Produced_Citation_Abbreviation: 2024-310-FA_MBES_Wallops_1m_NAD83_NAVD88_VAStatePlane_USSFT.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Christopher C. Bemelmans Contact_Organization: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8062 Contact_Electronic_Mail_Address: cbemelmans@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 34649380 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: -87.000000 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6096 Ordinate_Resolution: 0.6096 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: WGS_84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: World Geodetic System of 1984 Altitude_Resolution: 0.001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2024-310-FA_MBES_Wallops_1m_WGS84_UTM18N.xyz Entity_Type_Definition: ASCII text (.txt) file containing the processed 1-m bathymetric grid x,y,z data in the WGS84 [G2139] realization (ellipsoid height). Entity_Type_Definition_Source: HYPACK® Attribute: Attribute_Label: WGS84_18_X Attribute_Definition: WGS84 UTM Zone 18N X-coordinate (easting) of sample point, in meters. Attribute_Definition_Source: HYPACK® Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 453332.500 Range_Domain_Maximum: 464689.500 Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: WGS84_18_Y Attribute_Definition: WGS84 UTM Zone 18N Y-coordinate (northing) of sample point, in meters. Attribute_Definition_Source: HYPACK® Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4178775.500 Range_Domain_Maximum: 4194493.500 Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: WGS84_Z Attribute_Definition: WGS84 (ellipsoid height) of sample point, in meters. Attribute_Definition_Source: HYPACK® Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -51.96 Range_Domain_Maximum: -39.60 Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Uncertainty Attribute_Definition: CUBE Uncertainty, in meters. Attribute_Definition_Source: Qimera® Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.000000 Range_Domain_Maximum: 0.575153 Attribute_Measurement_Resolution: 0.000001 Detailed_Description: Entity_Type: Entity_Type_Label: 2024-310-FA_MBES_Wallops_1m_NAD83_NAVD88_VAStatePlane_USSFT.txt Entity_Type_Definition: ASCII text (.txt) file containing the processed 1-m bathymetric grid x,y,z data in NAD83 [2011], NAVD88, Virginia South State Plane Coordinate System, in US survey feet, which were derived using the GEOID18 model (orthometric height). Entity_Type_Definition_Source: VDatum Attribute: Attribute_Label: NAD83_SP_X Attribute_Definition: NAD83 Virginia South State Plane Coordinate System X-coordinate (easting) of sample point, in US survey ft. Attribute_Definition_Source: VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 12341377.40709 Range_Domain_Maximum: 12377521.46210 Attribute_Measurement_Resolution: 0.00001 Attribute: Attribute_Label: NAD83_SP_Y Attribute_Definition: NAD83 Virginia South State Plane Coordinate System Y-coordinate (northing) of sample point, in US survey ft. Attribute_Definition_Source: VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3812248.84202 Range_Domain_Maximum: 3864885.75118 Attribute_Measurement_Resolution: 0.00001 Attribute: Attribute_Label: NAVD88_Z Attribute_Definition: NAVD88 (orthometric height) Virginia South State Plane Coordinate System of sample point, in US survey ft. Attribute_Definition_Source: VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -46.07930 Range_Domain_Maximum: -5.44290 Attribute_Measurement_Resolution: 0.00001 Attribute: Attribute_Label: Uncertainty Attribute_Definition: CUBE Uncertainty, in meters, as reported for WGS84 (G2139) data. A static uncertainty value of 0.1214686 US survey feet is associated with the transformation of this data. Attribute_Definition_Source: Qimera® Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.000000 Range_Domain_Maximum: 0.575153 Attribute_Measurement_Resolution: 0.000001 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center Contact_Person: USGS SPCMSC Data Management Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: Saint Petersburg State_or_Province: FL Postal_Code: 33701 Country: United States Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov Resource_Description: 2024-310-FA_MBES_Wallops_1m_WGS84_UTM18N.xyz, 2024-310-FA_MBES_Wallops_1m_NAD83_NAVD88_VAStatePlane_USSFT.txt, 2024-310-FA_Wallops_MBES_1m_Backscatter.tiff Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by 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. Any use of trade, firm, or product 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: columnar text, GeoTIFF File_Decompression_Technique: ZIP Transfer_Size: 1943 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P14SGUMT/data/Wallops_2024_MBES_xyz.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P14SGUMT/data/Wallops_2024_MBES_Backscatter.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20250513 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center Contact_Person: USGS SPCMSC Data Management Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: Saint Petersburg State_or_Province: FL Postal_Code: 33701 Country: United States Contact_Voice_Telephone: 727-502-8000 Contact_Electronic_Mail_Address: gs-g-spcmsc_data_inquiries@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998