Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Daniel S. Brothers
Originator: Peter J. Haeussler
Originator: Gerry A. Hatcher
Originator: Robert M. Wyland
Publication_Date: 20250412
Title:
Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA
Geospatial_Data_Presentation_Form: GSF
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P1ED3GXB
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested Citation: Dartnell, P., Brothers, D.S., Haeussler, P.J., Hatcher, G.A., Wyland, R., 2025, Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P1ED3GXB.
Online_Linkage: https://doi.org/10.5066/P1ED3GXB
Description:
Abstract:
Processed Reson 7111 multibeam line files from a May 2015 survey offshore Cross Sound, southeast Alaska. Data were collected and processed by the U.S. Geological Survey (USGS) Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2015-629-FA. Data are provided as generic sensor format (GSF) line files.
Purpose:
In 2015 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) in cooperation with the Alaska Department of Fish and Game (ADFG) collected bathymetry and acoustic backscatter data offshore Cross Sound in southeast Alaska using an Reson 7111 multibeam echosounder mounded to the ADFG R/V Solstice. The survey was conducted to map the offshore expression of the Queen Charlotte fault system that runs for approximately 500 kilometers off the coast of southeast Alaska and British Columbia. This was the first in a series of surveys to map the entire offshore component of the fault. The fault system has generated numerous powerful earthquakes in the magnitude 7 and 8 range. This mapping will help understand the fault's slip rate, earthquake recurrence intervals, and paleoseismic history. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with multibeam processing software. Geographic information systems (GIS) ready multibeam bathymetry and acoustic backscatter grids are available in the associated data release (https://doi.org/10.5066/F7JH3KG6). These data are not intended to be used for navigation.
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=2015-629-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, as well as in a number of multibeam echosounder processing software, this metadata file may include some multibeam echosounder processing software-specific terminology.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20150505
Ending_Date: 20150521
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: -137.202
East_Bounding_Coordinate: -136.217
North_Bounding_Coordinate: 58.426
South_Bounding_Coordinate: 57.808
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:4ad43d19-0026-4ab9-889e-a64e52676703
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Bathymetry
Theme_Keyword: Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: bathymetry measurement
Theme_Keyword: sea-floor characteristics
Theme_Keyword: geospatial datasets
Theme_Keyword: marine geophysics
Theme_Keyword: multibeam sonar
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords
Theme_Keyword: seabed
Theme_Keyword: field observation
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
Theme_Keyword: generic sensor format
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of Alaska
Place_Keyword: Cross Sound
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Queen Charlotte Fault
Place_Keyword: Yakobi Sea Valley
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 and the Alaska Department of Fish and Game as the originators 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: 2015-629-FA_GSF_Files_QV.jpg
Browse_Graphic_File_Description: Preview image of 2015 Cross Sound GSF tracklines
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment: Caris HIPS and SIPS (ver. 9) on a Windows 10 computer.
Cross_Reference:
Citation_Information:
Originator: Peter Dartnell
Originator: Daniel S. Brothers
Originator: Peter J. Haeussler
Publication_Date: 2022
Title:
Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA
Other_Citation_Details:
Dartnell, P., Brothers, D.S., and Haeussler, P.J., 2022, Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA: U.S. Geological Survey data release, https://doi.org/10.5066/F7JH3KG6.
Online_Linkage: https://doi.org/10.5066/F7JH3KG6
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.
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 Coda Octopus F180 position and motion compensation system has a horizontal positional accuracy of about 0.4 m with Differential Global Positioning Systems (DGPS) corrections and roll and pitch accuracies of about 0.025 degrees (https://www.oceanscan.net/gallery/Data_Sheets/CODA_F180_PRECISION_ALTITUDE__POSITIONING_SYSTEMS.pdf). Accuracies of final products may be lower due to water depth and 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:
The Coda Octopus F180 position and motion compensation system has heave accuracy between 3.5cm - 5cm (https://www.oceanscan.net/gallery/Data_Sheets/CODA_F180_PRECISION_ALTITUDE__POSITIONING_SYSTEMS.pdf). Accuracies of final products may be lower due to water depth and 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.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Oceanic and Atmospheric Administration
Publication_Date: 2015
Title: Elfin Cove, AK - Station ID: 9452634
Publication_Information:
Publication_Place: online
Publisher: National Oceanic and Atmospheric Administration
Online_Linkage: https://tidesandcurrents.noaa.gov/stationhome.html?id=9452634
Type_of_Source_Media: online database
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20150501
Ending_Date: 20150530
Source_Currentness_Reference: ground condition at time data were collected
Source_Citation_Abbreviation: verified tides
Source_Contribution: Tide station data
Process_Step:
Process_Description:
In May 2015 the USGS, PCMSC mapped offshore Cross Sound in southeast Alaska over the northern section of the Queen Charlotte-Fairweather fault. A Reson 7111 multibeam echosounder was pole-mounted to the Alaska Department of Fish and Game R/V Solstice. The survey line files were imported into Caris HIPS and SIPS software (version 9) for bathymetric processing. Water column sound velocity data that were collected throughout the survey were applied to the bathymetry data and verified tides from the Elfin Cove tide station (9452634) were applied in post-processing. The data were cleaned of obvious bad soundings. GSF line files were exported from Caris HIPS and SIPS software. The data release support file section has sound velocity profiles as a single file (2015-629-FA_ALL_SVP.svp) with geographic locations, times, and sound velocities relative to depth in Caris HIPS and SIPS format. The support file section has the survey vessel file in Caris HIPS and SIPS format (ADFG_Solstice.hvf) that includes the vessel lever arm offsets and multibeam calibration corrections. The support file section has a verified tide table used in post-processing that includes data, time, and verified tide in Caris HIPS and SIPS format. The GSF files should have all this information applied but the files are included in the data release for completion.
Source_Used_Citation_Abbreviation: verified tides
Process_Date: 2024
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 504
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: WGS84
Ellipsoid_Name: WGS84
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean lower low water
Depth_Resolution: 0.01
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
These data are organized into separate zip files based on the date of collection (Julian day). Within each Julian day folder, there are Generic Senso Format (GSF) files labeled in the format "year_month_day_line_number_shipname". Additionally, these data are supplemented by files used for bathymetric processing. The data release support file section has sound velocity profiles as a single file (2015-629-FA_ALL_SVP.svp) with geographic locations, times, and sound velocities relative to depth in Caris HIPS and SIPS format. The support file section has the survey vessel file in Caris HIPS and SIPS format (ADFG_Solstice.hvf) that includes the vessel lever arm offsets and multibeam calibration corrections. The support file section has a verified tide table used in post-processing that includes data, time, and verified tide in Caris HIPS and SIPS format. The GSF files should have all this information applied but the files are included in the data release for completion.
Entity_and_Attribute_Detail_Citation:
files were exported from Teledyne Geospatial Caris HIPS and SIPS software (version 9) and have entity and attributes as published at https://www.ldeo.columbia.edu/res/pi/MB-System/mbweb/tmp/formatdoc/gsf_spec.pdf.
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 Generic Sensor Format (.gsf) along with 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: GSF
Format_Version_Number: Caris HIPS and SIPS (version 9)
Format_Information_Content:
Downloadable zip files contains survey day directories which contain the survey line files collected during that day.
File_Decompression_Technique: WinZip
Transfer_Size: 2154
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.5066/P1ED3GXB
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:
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 GSF files. The support files can be viewed with any text reader.
Metadata_Reference_Information:
Metadata_Date: 20250412
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_P1ED3GXB/CrossSound_USGS_2015_GSF_multibeam_line_files_metadata.html>
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