Bathymetry at entrance to Golovnin Lagoon, Alaska, 2024

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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: Richard M. Buzard
Originator: Alexander G. Snyder
Originator: Li Erikson
Publication_Date: 20250708
Title: Bathymetry at entrance to Golovnin Lagoon, Alaska, 2024
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P13YIWKC

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P13YIWKC
Larger_Work_Citation:

Citation_Information:

Originator: Li Erikson
Originator: Ann E. Gibbs
Originator: Richard M. Buzard
Originator: Daniel J. Nowacki
Originator: Alexander G. Snyder
Originator: Anita C. Engelstad
Originator: Cordell Johnson
Originator: Alexander L. Nereson
Originator: Jin-Si R. Over
Originator: Paul Russel
Originator: Colin Lyons
Publication_Date: 2025
Title: In situ field data, Coastal Alaska, 2023 to 2025
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P13YIWKC

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested Citation: Suggested Citation: Erikson L.H., Gibbs A.E., Buzard R.M., Nowacki D.J., Snyder A.G., Engelstad A.C., Johnson C., Nereson A.L., Over J.R., Russel, P., Lyons, C., 2025, In situ field data, Coastal Alaska 2023 to 2025: U.S. Geological Survey data release, https://doi.org/10.5066/P13YIWKC

Description:

Abstract:

This dataset contains nearshore bathymetry measurements collected at the entrance to Golovnin Lagoon, Alaska. The data were collected in September 2024 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 advance coastal storm response and recovery in Alaskan coastal communities in the wake of the September 2022 extratropical Typhoon Merbok disaster. It is being used by the USGS to support the development of dynamic flood models for more than 20 communities along the northwest coasts of Alaska. This product 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:

Work was funded by Title VII of Division N in the Consolidated Appropriations Act, 2023 (Public Law 117–328) to support direct recovery and rebuilding decisions in the wake of declared disasters related to hurricanes and typhoons in 2022. For more information on these efforts, see https://www.usgs.gov/supplemental-appropriations-for-disaster-recovery-activities/typhoon-merbok-coastal-community. Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2024-635-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:

Single_Date/Time:

Calendar_Date: 20240911

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: -163.08766
East_Bounding_Coordinate: -162.99025
North_Bounding_Coordinate: 64.54394
South_Bounding_Coordinate: 64.52270

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:55f62112-931f-464e-a478-e54778230e75

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: geoscientificInformation

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: Nome Census Area
Place_Keyword: City of Golovin
Place_Keyword: Golovnin Bay
Place_Keyword: Golovnin Lagoon

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: golovnin_lagoon_2024_bathy_browse.png
Browse_Graphic_File_Description:

Satellite image overlain with bathymetry data points collected at the entrance to Golovnin Lagoon, Alaska in September 2024.

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:

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.

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:

Survey-grade positions of the small boat were achieved with global navigation satellite system (GNSS) receivers and a single GNSS base station. The position of the GNSS base station was derived from two static GNSS occupations from July 10 and 11, 2024, with durations of approximately 11 and 12 hours, respectively. The static observations were processed using the National Geodetic Survey Online Positioning User Service (OPUS) and averaged to derive the final base station coordinates relative to the North American Datum of 1983 (2011 realization). Positioning data from the survey vessels were post-processed using Waypoint Grafnav to apply differential corrections from the GNSS base station. Manufacturer reported accuracy for the differentially corrected horizontal positions for the GNSS rover trajectories is 0.8 cm plus 1 ppm. Baselines from the GNSS base station varied between 0.4 km and 2.8 km, suggesting the average horizontal accuracy of survey vessel position to be about 3.6 cm. Uncertainty in the horizontal positions associated with pitch and roll of the survey vessels is unknown.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Uncertainty in the final elevations is derived from the combination of uncertainty in the GNSS positioning and bathymetric sounding measurements. Manufacturer reported accuracy for the differentially corrected vertical positions for the GNSS rover trajectories is 1.5 cm plus 1 ppm relative to the benchmark elevation, combined with the vertical accuracy of the NGS OPUS-derived position of the GNSS base station. Baselines from the GNSS base station reached 2.8 km, suggesting the vertical accuracy of survey vessel GNSS height relative to the ellipsoid to be 1.8 cm. However, the Geoid12b error in this region is 0.352 meters, bringing the orthometric (NAVD88) vertical accuracy to 0.354 m. The manufacturer of the single-beam echosounder used in this study reports a vertical accuracy of 1 cm. Additional uncertainty in the final computed elevations data is related to unmeasured variability in the speed of sound used to compute depths from bathymetric soundings and, thus, is depth-dependent. Based on analysis of available speed of sound measurements, we estimate uncertainties in the final depth soundings to be no greater than 1 percent of the water depth. The total vertical uncertainty is calculated using the constant- and depth-dependent factors summed in quadrature. Due to the relatively large error in the Geoid12b model, the final orthometric elevations range from 35.4 cm to 37.7 cm, with an average of 35.6cm. However, when working within geoid 12b, we recommend using the vertical accuracy values relative to the to the ellipsoid, which range from 2.1 cm to 13.1 cm, with an average of 7.6 cm. Uncertainty in the vertical positions associated with pitch and roll of the survey vessels is unknown.

Lineage:

Process_Step:

Process_Description:

Bathymetric data were collected using a single-beam sonar system and global navigation satellite system (GNSS) receiver mounted on a small boat. The sonar systems consisted of a CEE Hydrosystems CeeScope single-beam echosounder and 200 kHz transducer with a 9-degree beam angle. Depths from the echosounders were computed using sound velocity profiles measured using a YSI CastAway CTD during the survey. Positioning of the survey vessels was determined at 10 Hz using survey-grade GNSS receivers. Small boat operator to surveyed lines at speeds of 2 to 3 meters per second.

Process_Date: 20240911

Process_Step:

Process_Description:

Positions of the survey platforms were post-processed using a single-base station and differential post-processing. The position of the GNSS base station was derived from two static GNSS occupations from September 10 and 11, 2024, with durations of approximately 11 and 12 hours, respectively. The static observations were processed using the National Geodetic Survey Online Positioning User Service (OPUS) and averaged to derive the final base station coordinates relative to the North American Datum of 1983 (2011 realization). Positioning data from the GNSS receiver on the vessel was post-processed using Waypoint Grafnav to apply differential corrections from the GNSS base station. Orthometric elevations relative to the NAVD88 vertical datum were computed using National Geodetic Survey GEOID12A offsets. Bathymetric data were merged with post-processed positioning data and spurious soundings were removed using a custom Graphical User Interface (GUI) programmed with the computer program MATLAB. The final point data from the PWCs are projected in Cartesian coordinates using the UTM Zone 3 North, meters coordinate system.

Process_Date: 20241020

Process_Step:

Process_Description:

All available bathymetry data from the survey were compiled into a comma-delimited text file 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: 213752

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 3
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -165.0
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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: bathymetry_golovnin_lagoon_2024.csv
Entity_Type_Definition: Comma Separated Value (CSV) file containing data.
Entity_Type_Definition_Source: Producer Defined

Attribute:

Attribute_Label: Longitude
Attribute_Definition: Longitude in decimal degrees, WGS 1984
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -163.0859978
Range_Domain_Maximum: -162.9919697
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.0000001

Attribute:

Attribute_Label: Latitude
Attribute_Definition: Latitude in decimal degrees, WGS 1984
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 64.5229975
Range_Domain_Maximum: 64.5437963
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.0000001

Attribute:

Attribute_Label: Easting_m_UTM
Attribute_Definition:

X coordinate (easting) in meters NAD83(2011) / UTM zone 3N (EPSG: 6332)

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 591785.48
Range_Domain_Maximum: 596363.12
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Northing_m_UTM
Attribute_Definition:

Y coordinate (northing) in meters NAD83(2011) / UTM zone 3N (EPSG: 6332)

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7156801.94
Range_Domain_Maximum: 7158997.85
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: UTM_Zone
Attribute_Definition: UTM Zone in NAD83(2011) / UTM zone 3N (EPSG: 6332)
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 3N
Enumerated_Domain_Value_Definition: UTM Zone 3 North
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: Elevation_m_NAVD88
Attribute_Definition: Orthometric height (elevation) in meters NAVD88 GEOID12B
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -13.41
Range_Domain_Maximum: 0.25
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 the entrance to Golovnin Lagoon, Alaska. The first line is a header line and each subsequent line contains x and y coordinates in meters NAD83(2011) / UTM zone 3N (EPSG: 6332) 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

Resource_Description:

These data are available in a comma-separated value format (csv) accompanied by CSDGM FGDC-compliant metadata.

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: Microsoft Excel (version 2408 (Build 17928.20538 Click-to-Run))
Format_Information_Content: comma-delimited text file
File_Decompression_Technique: No compression applied.
Transfer_Size: 11.3

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P13YIWKC

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: 20250708
Metadata_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

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_P13YIWKC/bathymetry_golovnin_lagoon_2024_metadata.html>