Metadata: Identification_Information: Citation: Citation_Information: Originator: Chelsea A. Stalk Originator: Andrew S. Farmer Originator: Emily A. Wei Originator: Jennifer L. Miselis Publication_Date: 20221212 Title: Coastal Multibeam Bathymetry and Backscatter Data Collected in May 2021 From Seven Mile Island, New Jersey Geospatial_Data_Presentation_Form: raster digital data Larger_Work_Citation: Citation_Information: Originator: Chelsea A. Stalk Originator: Andrew S. Farmer Originator: Emily A. Wei Originator: Jennifer L. Miselis Publication_Date: 20221212 Title: Coastal Multibeam Bathymetry and Backscatter Data Collected in May 2021 From Seven Mile Island, New Jersey Series_Information: Series_Name: U.S. Geological Survey data release Issue_Identification: doi:10.5066/P9M2EQIR 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/P9M2EQIR Description: Abstract: An Ellipsoidally Referenced Survey (ERS) using two Teledyne Reson SeaBat T50-P multibeam echosounders, in dual-head configuration, was conducted by the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) covering the nearshore extent of Seven Mile Island, New Jersey, from May 19-23, 2021. The download file, 7Mile_2021_MBES_xyz.zip, includes processed elevation point data (x,y,z), as derived from a 1-meter (m) bathymetric grid. The download file, 7Mile_2021_MBES_Backscatter.zip, includes acoustic backscatter intensity data in 32-bit floating point GeoTIFF (Tagged Image File Format, .tif) format. Purpose: The purpose of the survey was to collect high-density multibeam bathymetry data nearshore of the Seven Mile Island, New Jersey to better evaluate shoreface morphology. Data were collected during USGS Field Activity Number (FAN) 2021-318-FA. Additional survey and data details are available from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-318-FA. Supplemental_Information: The processed sonar data are provided as American Standard Code for Information Interchange (ASCII) x,y,z point data files, and 32-bit floating point GeoTIFF (.tif) raster format. These values are not the individual soundings, but nodes from a 1-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) vertical and horizontal datums and were subsequently transformed using the National Oceanic and Atmospheric Administration's (NOAA) VDatum version 4.4.2 (v.4.4.2) transformation software (https://vdatum.noaa.gov/) horizontally to the North American Datum of 1983 (NAD83 [2011]) and vertically to the North American Vertical Datum of 1988 (NAVD88) relative to the GEOID model of 2012B (GEOID12B). Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20210519 Ending_Date: 20210523 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -74.776033 East_Bounding_Coordinate: -74.684551 North_Bounding_Coordinate: 39.106315 South_Bounding_Coordinate: 39.011586 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:d36938f0-7eb7-4f67-96a9-efa8190f8afd 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_Keyword: sea-floor acoustic reflectivity 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: Avalon Place_Keyword: Stone Harbor Place_Keyword: New Jersey Place_Keyword: Atlantic Ocean Place_Keyword: Cape May County Place_Keyword: Seven Mile Beach Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: May 2021 Access_Constraints: None Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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) 502-8000 Contact_Electronic_Mail_Address: cstalk@usgs.gov Data_Set_Credit: U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center Native_Data_Set_Environment: Microsoft Windows 7 Version 6.2 (Build 9200) Service Pack 1; NOAA’s VDatum (version 4.4.2); HYPACK/HYSWEEP (version 2020); Applanix POSPac MMS (POSPac) software (version 8.6, Service Pack 3); CARIS Hydrographic processing software HIPS/SIPS (version 11.4.3). Cross_Reference: Citation_Information: Originator: Calder, B.R. and Wells, D.E. 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 Publication_Date: 200802 Title: IHO Standards for Hydrographic Surveys Publication_Information: Publication_Place: 4, quai Antoine 1er B.P. 445 - MC 98011 MONACO Cedex 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 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This dataset was from a single research cruise with exact instrumentation and set up and were 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, into their respective programs. Logical_Consistency_Report: These files represent the post-processed bathymetric data (x,y,z) and acoustic intensity (.tif) collected during a multibeam bathymetry survey. Completeness_Report: These data are the complete, post-processed x,y,z bathymetric and backscatter data points from multibeam data collected nearshore Seven Mile Island, New Jersey, May 2021. 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). Individual Total Propagated Uncertainty (TPU) values associated with each node are available in the x,y,z file. 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). Individual TPU values associated with each node are available in the x,y,z file. Transformed data have an additional reported vertical transformation error of 7.6158 centimeters (cm). Lineage: Process_Step: Process_Description: Acquisition: An ERS consisting of multibeam bathymetry and acoustic backscatter 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/HYSWEEP (version 2020) managed data inputs from sensors and produced two files (.RAW and .HSX). Data were collected in WGS84 [G1762] Universal Transverse Mercator (UTM) Zone 18 North (18N) coordinates. Process_Date: 20210523 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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)502-8000 Contact_Electronic_Mail_Address: cstalk@usgs.gov Process_Step: Process_Description: Processing: Positioning and attitude data were post-processed in Applanix POSPac MMS (POSPac) software version 8.6 Service Pack 3. Raw position files were imported into POSPac and processed with the IN-Fusion PP-RTX processing mode utilizing Trimble CenterPoint RTX technology, 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 CARIS Hydrographic processing software HIPS/SIPS version 11.4.3. HYPACK acquisition files (.HSX) were first imported into CARIS and then post-processed navigation files (SBET and SMRMSG) were imported and applied. Additionally, 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. Roll calibration was also performed, as necessary. TPU was calculated from real time values recorded in the HSX and the SMRMSG files. 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 TPU greater than stated IHO Special Order standards (IHO, 2008). Refraction artifacts were addressed using the corrections tool within the Subset Editor. Additional editing was also performed in Subset Editor. A 1-m bathymetric CUBE surface was computed and a visual and statistical inspection of the data effecting the surface was performed and edited as needed to serve as quality control (Calder and Wells, 2007). The final surface was exported as an x,y,z ASCII file using the ‘Base Surface to ASCII’ function. Process_Date: 2022 Source_Produced_Citation_Abbreviation: 2021_318_7Mile_MBES_1m_WGS84_UTM18N.xyz Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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)502-8000 Contact_Electronic_Mail_Address: cstalk@usgs.gov Process_Step: Process_Description: Backscatter Mosaic Creation: Acoustic Intensity Backscatter data (.7k) were loaded in CARIS Hydrographic processing software HIPS/SIPS version 11.3.4 using the SIPS Backscatter tool. 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. These inputs, along with the following settings were entered into the tool, 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. Upon completion, a 1-m backscatter mosaic with intensity values ranging from 23.2044 to -42.9844 dB (decibels) was created. Three lines were excluded by the program due to computational error, and a noticeable banding effect is apparent, caused by the inability to gain each sonar head independently within the utilized software suite. After visual inspection, the mosaic was exported as a 32-bit float GeoTIFF (.tif) using the ‘surface to GeoTIFF’ function. Process_Date: 2022 Source_Produced_Citation_Abbreviation: 2021_318_7Mile_MBES_1m_Backscatter.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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) 502-8000 Contact_Electronic_Mail_Address: cstalk@usgs.gov Process_Step: Process_Description: Datum Transformation: Final x,y,z ASCII data were converted using NOAA's VDatum v.4.4.2 software conversion tool from the WGS84 [G1762] realization to NAD83 [2011] NAVD88, using the GEOID12B model (orthometric height). Source_Used_Citation_Abbreviation: 2021_318_7Mile_MBES_1m_WGS84_UTM18N.xyz Process_Date: 2022 Source_Produced_Citation_Abbreviation: 2021_318_7Mile_MBES_1m_NAD83_UTM18N_NAVD88_G12B.xyz Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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) 502-8000 Contact_Electronic_Mail_Address: cstalk@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: 20,815,135 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: -75.0 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: 2021_318_7Mile_MBES_1m_WGS84_UTM18N.xyz Entity_Type_Definition: ASCII text (.xyz) file containing the processed 1-m bathymetric grid x,y,z data in the WGS84 [G1762] realization (ellipsoid height). Entity_Type_Definition_Source: HYPACK Attribute: Attribute_Label: WGS84_UTM18N_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: 519391.000 Range_Domain_Maximum: 527274.000 Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: WGS84_UTM18N_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: 4318110.000 Range_Domain_Maximum: 4328598.000 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: -50.912 Range_Domain_Maximum: -39.073 Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: TPU Attribute_Definition: TPU = Total Propagated Uncertainty, in meters. Attribute_Definition_Source: CARIS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.039 Range_Domain_Maximum: 0.286 Attribute_Measurement_Resolution: 0.001 Detailed_Description: Entity_Type: Entity_Type_Label: 2021_318_7Mile_MBES_1m_NAD83_UTM18N_NAVD88_G12B.xyz Entity_Type_Definition: ASCII text (.xyz) file containing the processed 1-m bathymetric grid x,y,z data in NAD83 [2011], NAVD88, which were derived using the GEOID12B model (orthometric height). Entity_Type_Definition_Source: HYPACK; VDatum Attribute: Attribute_Label: NAD83_UTM18N_X Attribute_Definition: NAD83 UTM Zone 18N X-coordinate (easting) of sample point, in meters. Attribute_Definition_Source: HYPACK; VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 519391.52961 Range_Domain_Maximum: 527274.52881 Attribute_Measurement_Resolution: 0.00001 Attribute: Attribute_Label: NAD83_UTM18N_Y Attribute_Definition: NAD83 UTM Zone 18N Y-coordinate (northing) of sample point, in meters. Attribute_Definition_Source: HYPACK; VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4318108.98423 Range_Domain_Maximum: 4328596.98164 Attribute_Measurement_Resolution: 0.00001 Attribute: Attribute_Label: NAVD88_GEOID12B_Z Attribute_Definition: NAVD88 (orthometric height) of sample point, in meters, with respect to GEOID12B. Attribute_Definition_Source: HYPACK; VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -14.33600 Range_Domain_Maximum: -2.48700 Attribute_Measurement_Resolution: 0.00001 Attribute: Attribute_Label: TPU_WGS84 Attribute_Definition: Total Propagated Uncertainty, in meters, as reported for WGS84 data. A static uncertainty value of 7.6158 cm is associated with the transformation of this data. Attribute_Definition_Source: CARIS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.039 Range_Domain_Maximum: 0.286 Attribute_Measurement_Resolution: 0.001 Overview_Description: Entity_and_Attribute_Overview: 2021_318_7Mile_MBES_1m_Backscatter.tif: Dataset is GeoTIFF included in the download file, 7Mile_2021_MBES_Backscatter.zip, which is acoustic backscatter intensity data in 32-bit floating point GeoTIFF (.tif) format with 22680 columns and 12722 rows. Dataset is projected to the WGS 1984 UTM Zone 18N coordinate system. Entity_and_Attribute_Detail_Citation: The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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) 502-8000 Contact_Electronic_Mail_Address: cstalk@usgs.gov Resource_Description: 2021_318_7Mile_MBES_1m_WGS84_UTM18N.xyz, 2021_318_7Mile_MBES_1m_NAD83_UTM18N_NAVD88_G12B.xyz, 2021_318_7Mile_MBES_1m_Backscatter.tif Distribution_Liability: 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 on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. 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: Raster data format, GeoTIFF File_Decompression_Technique: ZIP Transfer_Size: 367 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9M2EQIR/data/7Mile_2021_MBES_xyz.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9M2EQIR/data/7Mile_2021_MBES_Backscatter.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20221212 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chelsea A. Stalk 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)502-8000 Contact_Electronic_Mail_Address: cstalk@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Security_Information: Metadata_Security_Classification_System: none Metadata_Security_Classification: unclassified Metadata_Security_Handling_Description: None