High-resolution acoustic backscatter data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA

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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: Alicia F. Balster-Gee
Originator: Daniel S. Brothers
Originator: David P. Finlayson
Originator: Lee Liberty
Originator: Peter Dartnell
Originator: Gerry A. Hatcher
Originator: Peter J. Haeussler
Originator: Mike Byerly
Publication_Date: 2019
Title:

High-resolution acoustic backscatter data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA

Geospatial_Data_Presentation_Form: TIFF
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9K1YQ35

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/P9K1YQ35
Online_Linkage:

https://www.sciencebase.gov/catalog/file/get/5c5ccc99e4b0fe48cb31259b

Larger_Work_Citation:

Citation_Information:

Bathymetry, acoustic backscatter, and minisparker seismic-reflection datasets collected southwest of Montague Island and southwest of Chenega, Alaska during field activity 2014-622-FA

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9K1YQ35

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P9K1YQ35

Description:

Abstract:

High-resolution acoustic backscatter data were collected by the U.S. Geological Survey (USGS) and the Alaska Department of Fish and Game in May of 2014 southwest of Chenega Island, Alaska. Data were collected aboard the Alaska Department of Fish and Game vessel, R/V Solstice, during USGS field activity 2014-622-FA, using a pole mounted 100-kHz Reson 7111 multibeam echosounder.

Purpose:

This work was funded by the U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program (CMHRP) Marine Geohazards Project and the Alaska Department of Fish and Game (ADFG). The high-resolution bathymetry of bedrock, sediment deposits, and tectonic structure provide geologic information that is essential to hazard assessment, regional sediment management, and coastal and marine spatial planning at Federal, State, and local levels, as well as to future research on the geomorphic, sedimentary, tectonic, and climatic record of southeastern Alaska. These data and information are intended for science researchers, students from elementary through college, policy makers, and the general public.

Supplemental_Information:

Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-622-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 data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20140507
Ending_Date: 20140522

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -148.297885
East_Bounding_Coordinate: -147.954768
North_Bounding_Coordinate: 60.336390
South_Bounding_Coordinate: 60.198236

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5c5ccc99e4b0fe48cb31259b

Theme:

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

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Substrate
Theme_Keyword: Distributions

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sea-floor acoustic reflectivity
Theme_Keyword: sea-floor characteristics
Theme_Keyword: geospatial datasets
Theme_Keyword: marine geophysics
Theme_Keyword: multibeam sonar

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seabed
Theme_Keyword: acoustic methods
Theme_Keyword: mapping
Theme_Keyword: geophysics

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: Pacific Ocean
Place_Keyword: Gulf of Alaska
Place_Keyword: Prince William Sound
Place_Keyword: Chenega Island
Place_Keyword: Chenega Strait
Place_Keyword: Dangerous Passage
Place_Keyword: Knight Island Passage
Place_Keyword: Icy Bay
Place_Keyword: Nassau Bay
Place_Keyword: Jackpot Bay
Place_Keyword: Jackpot Island
Place_Keyword: Verdant Island
Place_Keyword: Evans Island
Place_Keyword: Latouche Island
Place_Keyword: Whale Bay
Place_Keyword: Bainbridge Passage
Place_Keyword: Port Bainbridge

Place:

Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: North Pacific Ocean

Access_Constraints: None
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_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

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/5c5ccc99e4b0fe48cb31259b?name=2014-622-FA_Chenega_UTM6N_10m_Backscatter_map.png&allowOpen=true

Browse_Graphic_File_Description:

Map showing acoustic-backscatter data southwest of Chenega Island

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment:

Caris HIPS and SIPS (ver. 9) and ArcMap (ver. 10.3.1) on a Windows 7 computer

Cross_Reference:

Citation_Information:

Originator: Daniel S. Brothers
Originator: Peter J. Haeussler
Originator: Lee Liberty
Originator: David Finlayson
Originator: Eric Geist
Originator: Keith Labay
Originator: Mike Byerly
Publication_Date: 2016
Title:

A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska

Other_Citation_Details:

Brothers and others, 2016, A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska: Earth and Planetary Science Letters, v. 438, p.112-121.

Online_Linkage: https://doi.org/10.1016/j.epsl.2016.01.008

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The accuracy of the Reson acoustic-backscatter data is unknown since it is believed the backscatter is uncalibrated. Also, during post-processing, the backscatter data from all repeat mapping surveys were gain normalized together so the backscatter data in this report differ from the original individual surveys' data.

Logical_Consistency_Report: No formal logical accuracy tests were conducted.
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 stated accuracy of the Applanix POS-MV post-processed horizontal position is about 0.1 m, with roll and pitch stated accuracies of about 0.02 degrees (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Not applicable to acoustic-backscatter data

Lineage:

Process_Step:

Process_Description:

In 2014, the U.S. Geological Survey (USGS), in cooperation with the Alaska Department of Fish and Game (ADFG) mapped offshore the southwest corner of Chenega Island and near Chenega Alaska. A 100-kHz Reson 7111 multibeam echosounder was pole-mounted to the ADFG R/V Solstice, and an Applanix POS-MV (Position and Orientation System for Marine Vessels) was used to position the vessel during data collection where it also accounted for vessel motion such as heave, pitch, and roll. The POS-MV also recorded position and vessel motion parameters for later post-processing. Soundings were corrected real-time using inputs from the POS-MV and corrected for water column sound velocity variations using sound velocity values calculated from CTD casts. In 2019, the Reson 7111 S7K line files were downloaded from USGS archives and imported into SonarWiz processing software (version 6). The S7K line files were processed for backscatter and gridded into 10-m resolution grids. The grids were exported as Erdas Imagine files in UTM, zone 6, WGS84 coordinates. The grids were imported in ESRI ArcMap and converted to geoTIFFs.

Process_Date: 20190215

Process_Step:

Process_Description: Edits were made to standardize a few of the "None" keywords.
Process_Date: 20190620
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Susan A Cochran
Contact_Organization:

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

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States

Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 1507
Column_Count: 1873

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 6N
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -147.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 10.000000
Ordinate_Resolution: 10.000000

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Value
Entity_Type_Definition: depth relative to Mean Lower Low Water
Entity_Type_Definition_Source: Producer defined

Overview_Description:

Entity_and_Attribute_Overview:

10-m resolution merged Southwest Chenega Island, Gulf of Alaska bathymetry grid was originally archived as a TIFF image with the following attributes. >Cell size = 10.0, 10.0 >Number of rows = 1507 >Number of columns = 1873 >Data type = floating point >Boundary >Xmin = 428340.001761 >Xmax = 447070.001761 >Ymin = 6674190.001763 >Ymax = 66892060.001763 >Statistics >Minimum value = 0 >Maximum value = 172 >Mean = 100.3164779513307 >Standard deviation = 8.296661089153924 >Coordinate system description >Projection UTM >Zone 06 >Datum NAD83 >Vertical Reference MLLW >Units meter

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

These data are available in TIFF format, including a tiff world file (.tfw), and accompanied by FGDC-compliant metadata and a browse graphic.

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: geoTIFF
Format_Version_Number: ArcMap (version 10.3.1)
Format_Information_Content:

Zip file contains the TIFF (.tif), the tiff world file (.tfw), an XML (.xml) version of the metadata, and a browse graphic.

File_Decompression_Technique: zip command in the Unix command line
Transfer_Size: 1.9

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/5c5ccc99e4b0fe48cb31259b

Network_Resource_Name:

https://www.sciencebase.gov/catalog/item/5c5ccc99e4b0fe48cb31259b

Network_Resource_Name: https://doi.org/10.5066/P9K1YQ35

Access_Instructions:

Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file containing all files. The second link points to a page with the geoTIFF, metadata, and browse graphic. The third link points to a landing page for the entire data release.

Fees: None.

Technical_Prerequisites:

The downloadable data file has been compressed with the "zip" command and can be unzipped with WinZip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ASCIIRaster file.

Metadata_Reference_Information:

Metadata_Date: 20201019
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/ScienceBase/DR_P9K1YQ35/2014-622-FA_Chenega_UTM6N_10m_Backscatter_metadata.html>