Bathymetry at Kotzebue, Alaska, July 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: Ann E. Gibbs
Originator: Anita C. Engelstad
Originator: Jin-Si R. Over
Originator: Richard M. Buzard
Originator: Alexander G. Snyder
Originator: Alexander L. Nereson
Publication_Date: 20260313
Title: Bathymetry at Kotzebue, Alaska, July 2024
Geospatial_Data_Presentation_Form: comma-delimited text
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 (ver. 2.0, March 2026)

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: 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 (ver. 2.0, March 2026): U.S. Geological Survey data release, https://doi.org/10.5066/P13YIWKC.

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

Description:

Abstract:

This dataset contains nearshore and inland bathymetry near Kotzebue, Alaska. The data were collected on July 10, 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=2024-637-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: 20240710

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: -162.6202721
East_Bounding_Coordinate: -162.5320066
North_Bounding_Coordinate: 66.9245172
South_Bounding_Coordinate: 66.8916359

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:db6b0ba8-c571-4595-81a4-5a5bb16324e0

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: Northwest Arctic Borough
Place_Keyword: City of Kotzebue
Place_Keyword: Kotzebue Sound

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: kotzebue_2024_bathy_browse.png
Browse_Graphic_File_Description:

Satellite image overlain with bathymetry data points collected offshore of Kotzebue, Alaska in July 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: All data fall 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:

The estimated horizontal uncertainty of survey points is 0.05 m. Positions of the work skiff from which the survey was conducted were obtained with a survey-grade global navigation satellite system (GNSS) receiver and a GNSS base station. The GNSS base station was set up on an existing benchmark on land (ID BBDY64) during the bathymetry survey. Base station GNSS RINEX files were uploaded to the National Geodetic Survey Online Positioning User Service (OPUS) to derive the final base station coordinates relative to the North American Datum of 1983 (2011 realization). The resulting solutions were compared to the existing coordinates for the benchmark and found to be within 1 cm of published coordinates. Positioning data from the survey vessels were post-processed using Waypoint Grafnav to apply differential corrections from the GNSS base station. Uncertainty in the horizontal positions due to vessel pitch and roll is unquantified but expected to be low given light winds and small waves (less than 1 foot).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The estimated vertical uncertainty of survey points is included in the dataset ("Elevation_Uncertainty_m") and ranges from 0.05 to 0.59 m. These values were calculated by summing in quadrature the uncertainties from GNSS positioning, echosounder measurements, and modeled sound speed in water. Manufacturer-reported uncertainty for differentially corrected Trimble GNSS rover positions is 1.5 cm plus 1 ppm of the survey baseline, combined with the vertical accuracy of the NGS OPUS-derived GNSS base station position. The single-beam echosounder used in this study has a reported vertical accuracy of 1 cm. The speed of sound in water was not measured during this survey, but it was modeled using representative Arctic coastal temperature and salinity ranges; this uncertainty increases with depth. Vertical error due to vessel pitch and roll was not quantified but is expected to be low given light winds and waves less than 1 ft. Pitch and roll under 4.5 degrees do not affect depth readings for the 9-degree beam transducer, assuming a vertical antenna/transducer installation and relatively flat seafloor. For larger pitch/roll values the depth measurement increases only slightly: a pitch/roll of 20 degrees (effective beam tilt of 15.5 degrees) would increase depth readings by only approximately 3.8 percent.

Lineage:

Process_Step:

Process_Description:

Single-beam bathymetry data were collected on July 10, 2024, using a survey-grade echosounder. The system consisted of a CEE HydroSystems CEESCOPE with a 200 kHz transducer (9-degree beam angle) and a Trimble GNSS receiver. The transducer and receiver were attached to the bottom and top (respectively) of a 2.20 meter-long survey rod. The rod was mounted to the side of a 25 ft aluminum work skiff using an adjustable angle bracket. The rod was rotated to a vertical position using a bubble level once the skiff was underway and lowered into the water so the transducer was submerged to a depth of 20 cm. GNSS positions were logged at 10 Hz while traveling at a target speed of under 3 meters per second. Wind conditions were light with 1 ft waves.

Process_Date: 20240710

Process_Step:

Process_Description:

Survey positions were post-processed using a base station and differential post-processing. The position of the GNSS base station was derived from a static GNSS occupation on July 10, 2024. 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 GEOID12B offsets. Bathymetric soundings 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.

Process_Date: 20240820

Process_Step:

Process_Description:

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

Process_Date: 20251124

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: 184780

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_kotzebue_20240710.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: -162.6202721
Range_Domain_Maximum: -162.5320066
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: 66.8916359
Range_Domain_Maximum: 66.9245172
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: 604177.02
Range_Domain_Maximum: 607978.28
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: 7421341.14
Range_Domain_Maximum: 7425060.15
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

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: -17.86
Range_Domain_Maximum: 0.84
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Elevation_Uncertainty_m
Attribute_Definition: Estimated elevation uncertainty in meters
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.05
Range_Domain_Maximum: 0.59
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

Overview_Description:

Entity_and_Attribute_Overview:

These metadata describe a comma-separated value (csv) file containing nearshore and inland bathymetry data from Kotzebue, Alaska. The first line is a header line and each subsequent line contains x and y coordinates in decimal degrees WGS 84 (EPSG: 4326), x and y coordinates in meters NAD83(2011) / UTM zone 3N (EPSG: 6332), an orthometric height (elevation) in meters NAVD88 GEOID12B, the uncertainty associated with orthometric height, in meters, and the UTM zone used (3N).

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: 10.6

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: 20260313
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_kotzebue_20240710_metadata.html>