Nearshore bathymetry at Point Barrow, Alaska, 2022

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Daniel J. Nowacki
Originator: Cordell Johnson
Originator: Joshua B. Logan
Originator: Andrew W. Stevens
Publication_Date: 20250709
Title: Nearshore bathymetry at Point Barrow, Alaska, 2022
Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI: 10.5066/P15BS65X

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: Geological Survey

Other_Citation_Details:

Suggested citation: Nowacki, D.J., Johnson, C., Logan, J.B., Stevens, A.W., 2025, Nearshore bathymetry at Point Barrow, Alaska, 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P15BS65X.

Online_Linkage: https://doi.org/10.5066/P15BS65X

Description:

Abstract:

This dataset contains nearshore bathymetry measurements collected at Point Barrow, Alaska. The data were collected in July 2022 using a single beam echosounder and global navigation satellite system receiver and subsequently processed by the U.S. Geological Survey, Pacific Coastal and Marine Science Center. Results are provided in a comma-separated value format (csv).

Purpose:

This product was created to support coastal water level modeling along the Alaska coastline. It is intended for reuse by scientists, managers, and the general public. These data can be opened with any text viewer, spreadsheet editor, or geographic information systems (GIS) software for review, visualization, and analysis purposes.

Supplemental_Information:

Additional information about the field activity or activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-642-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, this metadata file may include some vendor-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20220729
Ending_Date: 20220730

Currentness_Reference: ground condition at the time source data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -156.498916
East_Bounding_Coordinate: -156.428817
North_Bounding_Coordinate: 71.396931
South_Bounding_Coordinate: 71.380881

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:a1f5c532-e5f8-43bc-a31f-67a420be038e

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB)
Theme_Keyword: coast

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: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of Alaska
Place_Keyword: North Slope Borough
Place_Keyword: Point Barrow
Place_Keyword: Beaufort Sea
Place_Keyword: Chukchi Sea

Access_Constraints: No access constraints
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: PCMSC Science Data Coordinator
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: point_barrow_bathy_2022_browse.png
Browse_Graphic_File_Description:

Satellite image overlain with bathymetry data points collected at Point Barrow, Alaska in July 2022

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: MATLAB Version: 9.8.0.1396136 (R2020a)

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.

Logical_Consistency_Report: All data falls within expected ranges.
Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal positions of the survey vessel were post-processed to apply differential corrections obtained from the National Geodetic Survey Site BRW1, located approximately 17 km from the survey area. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GNSS rover trajectories is 0.8 cm + 0.5 ppm, suggesting a horizontal accuracy of approximately 1.7 cm. Uncertainty in the horizontal positions associated with pitch and roll of the survey vessels is unknown.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Manufacturer reported accuracy for the differentially corrected vertical positions for the GNSS rover trajectories is 1.5 cm + 1 ppm. The GNSS base station was located roughly 17 km from the survey site, suggesting the vertical accuracy of survey vessel positions to be 3.2 cm relative to the base station coordinate. Additional manufacturer reported uncertainty in the bathymetric soundings is 1 cm + 0.1 percent of water depth. Maximum water depths surveyed on this mapping mission are approximately 8 m, yielding a maximum vertical uncertainty of the bathymetric soundings of 1.8 cm. Total combined uncertainty in the bathymetric elevations is derived by summing the uncertainties from the GNSS and echosounder in quadrature, yielding a total uncertainty of approximately 3.7 cm. Uncertainty in the vertical positions associated with pitch and roll of the survey vessels is unknown.

Lineage:

Process_Step:

Process_Description:

Bathymetry data were collected between July 29 and 30, 2022, using single-beam sonar systems and global navigation satellite systems (GNSS) receivers mounted on a small vessel. Depths from the echosounders were computed using sound velocity profiles measured using a CTD during the survey. Positioning of the survey vessels was determined at 10 Hz using survey-grade GNSS receivers. Output from the GNSS receivers and sonar systems were combined in real time by a computer running HYPACK hydrographic survey software. Navigation information was displayed on a video monitor, allowing vessel operators to navigate along planned survey lines.

Process_Date: 20220729

Process_Step:

Process_Description:

Survey-grade positions of the vessels were achieved with a single-base station and differential post-processing. Positioning data from the GNSS receivers were post-processed using Waypoint Grafnav to apply differential corrections from the GNSS base station site BRW1 operated by the National Geodetic Survey with known horizontal and vertical coordinates relative to the North American Datum of 1983. Orthometric elevations relative to the NAVD88 vertical datum were computed using NGS Geoid18 offsets. Bathymetric data were merged with post-processed positioning data, speed of sound corrections were applied, and spurious soundings were removed using a custom Graphical User Interface (GUI) programmed with the computer program MATLAB. The final point data are projected in cartesian coordinates in NAD83(2011) / UTM zone 4N (EPSG: 6333).

Process_Date: 20220829

Process_Step:

Process_Description:

All available bathymetry data from the survey were compiled into a comma-delimited text file in MATLAB for distribution.

Process_Date: 20250625

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: 225311

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 4
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -159.0
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: D NAD 1983 2011
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988 (NAVD88) GEOID12B
Altitude_Resolution: 0.01
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: bathymetry_point_barrow_2022.csv
Entity_Type_Definition: Comma-separated value file
Entity_Type_Definition_Source: Producer Defined

Attribute:

Attribute_Label: x_meters_utmz4n
Attribute_Definition:

X coordinate (easting) in meters NAD83(2011) / UTM zone 4N (EPSG: 6333)

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 589074.54
Range_Domain_Maximum: 591559.47
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: y_meters_utmz4n
Attribute_Definition:

Y coordinate (northing) in meters NAD83(2011) / UTM zone 4N (EPSG: 6333)

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7921915.89
Range_Domain_Maximum: 7923235.58
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: z_meters_navd88
Attribute_Definition: Orthometric height (elevation) in meters NAVD88 GEOID12B
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -7.82
Range_Domain_Maximum: 0.39
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Overview_Description:

Entity_and_Attribute_Overview:

These metadata describe a comma-separated value (csv) file containing bathymetry data from Point Barrow, Alaska. The first line is a header line, and each subsequent line contains x and y coordinates in meters NAD83(2011) / UTM zone 4N (EPSG: 6333) and an orthometric height (elevation) in meters NAVD88 GEOID12B.

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - CMGDS

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

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 on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Comma-delimited text
Format_Version_Number: MATLAB Version: 9.8.0.1396136 (R2020a)
Format_Specification: text
Format_Information_Content: comma-delimited text file
File_Decompression_Technique: No compression applied
Transfer_Size: 6.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P15BS65X

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Sonar Data section.

Fees: None

Technical_Prerequisites:

These data can be opened with any text viewer, spreadsheet editor, or geographic information systems (GIS) software.

Metadata_Reference_Information:

Metadata_Date: 20250709
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P15BS65X/bathymetry_point_barrow_2022_metadata.html>