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