Polygon shapefile of data sources used to create a bathymetric terrain model of multibeam sonar data collected between 2005 and 2018 along the Queen Charlotte Fault System in the eastern Gulf of Alaska from Cross Sound, Alaska to Queen Charlotte Sound, Canada. (Esri polygon shapefile, UTM 8 WGS 84)

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Frequently anticipated questions:

What does this data set describe?

Title:
Polygon shapefile of data sources used to create a bathymetric terrain model of multibeam sonar data collected between 2005 and 2018 along the Queen Charlotte Fault System in the eastern Gulf of Alaska from Cross Sound, Alaska to Queen Charlotte Sound, Canada. (Esri polygon shapefile, UTM 8 WGS 84)
Abstract:
This data publication is a compilation of six different multibeam surveys covering the previously unmapped Queen Charlotte Fault offshore southeast Alaska and Haida Gwaii, Canada. These data were collected between 2005 and 2018 under a cooperative agreement between the U.S. Geological Survey, Natural Resources Canada, and the National Oceanic and Atmospheric Administration. The six source surveys from different multibeam sonars are combined into one terrain model with a 30-meter resolution. A complementary polygon shapefile records the extent of each source survey in the output grid.
Supplemental_Information: None
  1. How might this data set be cited?
    U.S. Geological Survey, 20221101, Polygon shapefile of data sources used to create a bathymetric terrain model of multibeam sonar data collected between 2005 and 2018 along the Queen Charlotte Fault System in the eastern Gulf of Alaska from Cross Sound, Alaska to Queen Charlotte Sound, Canada. (Esri polygon shapefile, UTM 8 WGS 84): data release DOI:10.5066/P9YGDHIQ, U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.

    Online Links:

    This is part of the following larger work.

    Andrews, Brian D., Brothers, Daniel S., Dartnell, Peter, and Barrie, James V., 2022, A bathymetric terrain model of multibeam sonar data collected between 2005 and 2018 along the Queen Charlotte Fault System in the Eastern Gulf of Alaska from Cross Sound, Alaska to Queen Charlotte Sound, Canada: data release DOI:10.5066/P9YGDHIQ, U.S. Geological Survey, Reston, Virginia.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Andrews, B.D., Brothers, D.S., Dartnell, P., Barrie, J.V., 2022, A bathymetric terrain model of multibeam sonar data collected between 2005 and 2018 along the Queen Charlotte Fault System in the Eastern Gulf of Alaska from Cross Sound, Alaska to Queen Charlotte Sound, Canada: U.S. Geological Survey data release, https://doi.org/P9YGDHIQ
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -139.32383
    East_Bounding_Coordinate: -129.80920
    North_Bounding_Coordinate: 58.432335
    South_Bounding_Coordinate: 51.420323
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/6023f779d34e31ed20c874f1?name=QueenCharlotteFault_Regional_Bathymetry_Source_browse.jpg (JPEG)
    Browse image of shapefile of source grids used to create the 30-meter bathymetric grid of Queen Charlotte Fault region, eastern Gulf of Alaska.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 14-Jul-2005
    Ending_Date: 29-Jun-2018
    Currentness_Reference:
    Ground Condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • GT-polygon composed of chains (6)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 8
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -135.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 0.00001
      Ordinates (y-coordinates) are specified to the nearest 0.00001
      Planar coordinates are specified in meters
      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
  7. How does the data set describe geographic features?
    QueenCharlotteFault_Regional_Bathymetry_Source
    Table containing attribute information associated with the data set. (Source: USGS)
    FID
    Internal feature number. (Source: Esri)
    Range of values
    Minimum:0
    Maximum:5
    Shape
    Feature geometry. (Source: Esri) Coordinates defining the features.
    ID
    Mosaic Order (Source: Esri)
    Range of values
    Minimum:1
    Maximum:6
    Source
    name of the source GeoTiff used to create the polygon. (Source: USGS) character set

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
    Please recognize the U.S. Geological Survey (USGS) as the source of this information.
  3. To whom should users address questions about the data?
    Brian D. Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Road
    Woods Hole, Massachusetts
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov

Why was the data set created?

This polygon shapefile records the extent of each source GeoTIFF used to create the terrain model. Areas where source polygons overlap indicate where the "blend" option during the mosaic process calculated the depth.

How was the data set created?

  1. From what previous works were the data drawn?
    CrossSound_2015_bathy_10m_UTM08_WGS84_WGS84.tif (source 1 of 6)
    Dartnell, Peter, Brothers, Daniel S., and Haeussler, Peter J., 2022, Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA: data release DOI:10.5066/F7JH3KG6, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

    Type_of_Source_Media: GeoTIFF
    Source_Contribution: Data were downloaded as a GeoTIFF
    2016_625_FA_Reson7160_Bathymetry_10m.tif (source 2 of 6)
    Andrews, Brian D., Brothers, Daniel S., Uri S. ten Brink, Kluesner, Jared W., Haeussler, Peter J., Wyland, Robert M., and Currie, Jackson E., 2022, Multibeam bathymetric and backscatter data collected in the eastern Gulf of Alaska along the Queen Charlotte Fault, U.S. Geological Survey Field Activity 2016-625-FA: data release DOI:10.5066/P9BTWEXK, U.S. Geological Survey, Reston, Virginia.

    Online Links:

    Type_of_Source_Media: GeoTIFF
    Source_Contribution: Data were downloaded as a GeoTIFF
    NoyesCyn_2017_2018_30m_bathy_UTM08_WGS84.tif (source 3 of 6)
    Dartnell, Peter, Andrews, Brian D., and Brothers, Daniel S., 2022, Multibeam bathymetry and acoustic-backscatter data collected in 2017 and 2018 of Noyes Submarine Canyon and vicinity, southeast Alaska: data release DOI:10.5066/P9AU5I03, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

    Type_of_Source_Media: GeoTIFF
    Source_Contribution: Data were downloaded as a GeoTIFF
    MB_MOSAIC_QC_FAULT.tif (source 4 of 6)
    Barrie, J. Vaughn, Greene, H. Gary, W.Conway, Kim, Brothers, Daniel S., Enkin, Randolph J., Conrad, James E., Lauer, Rachel M., McGann, Mary, Neelands, Peter J., and East, Amy, 2018, The Queen Charlotte–Fairweather Fault Zone – A submarine transform fault, offshore British Columbia and southeastern Alaska; cruise report of 2017003PGC CCGS Vector and 2017004PGC CCGS John P. Tully: Geological Survey of Canada, Open File Report 8398, 159 p.: Open File 8398, Geological Survey of Canada, Canada.

    Online Links:

    Type_of_Source_Media: GeoTIFF
    Source_Contribution:
    GeoTIFF was sent by J.V. Barrie to B.D. Andrews 11/18/18. Original grid (MB_MOSAIC_QC_FAULT.tif) was reprojected from UTM 09, WGS 84 into a new grid (QC_Fault_NRC_UTM08_30m.tif) UTM 08, WGS 84 and resampled from 5-m resolution to 30-m resolution using the "reproject raster tool" in ArGIS Pro (v. 2.7.0).
    KM05014_30m.tif (source 5 of 6)
    Gardner, James V., and Mayer, Larry A., 2005, U.S. Law of the Sea cruise to map the foot of the slope and 2500-m isobath of the Gulf of Alaska continental margin: Cruise Report 05-01, Center for Coastal and Ocean Mapping/Joint Hydrographic Center, University of New Hampshire, Durham New, Hampshire.

    Online Links:

    Type_of_Source_Media: raster digital data
    Source_Contribution:
    Raw mb56 files were downloaded from NCEI in July 2016 and processed using CARIS HIPS (v.9.1). Data included in this grid cover the dates 7/4/2005-7/14/2005. Data collected on other dates during this survey are not included.
    SKQ201611T_30m.tif (source 6 of 6)
    Lewis, Jon, 2016, Multibeam Sonar (Kongsberg EM302) data as collected during the cruise SKQ201611T, Science, Technology, Engineering and Math Student Experiences Aboard Ships (STEMSEAS). Rolling Deck to Repository (R2R). https://doi.org/10.7284/125930. Accessed [2016-09]: Cruise Report 05-01, National Center for Environmental Information, Boulder,CO.

    Online Links:

    Type_of_Source_Media: GeoTIFF
    Source_Contribution:
    Processed multibeam files were shared directly with USGS on 8/31/16. Files were imported to CARIS HIPS (v. 9.1) and edited. Depth surface was created using the UTM 08, WGS 84 coordinate system at 30-meter resolution. Final surface was exported as a 32-bit floating point GeoTIFF (SKQ201611T_30m.tif)
  2. How were the data generated, processed, and modified?
    Date: 22-Jan-2021 (process 1 of 2)
    STEP 1: CREATE POLYGON MASK FOR EACH INPUT GRID
    A polygon shapefile of the extent of each of the 6 grids used as a source for the terrain model was created using a two-step process using ArcGIS Pro (v. 2.7.). First, an 8-bit raster was created using the logical expression "GridName less than zero". Second this 8-bit raster was converted to a polygon shapefile ("GridName"_Source.shp) using the "Raster to Polygon" tool. The "GridName" for both the input(.tif) and output shapefiles (.shp) are listed below. Contact information for all processing steps are the same (Brian Andrews). Person who carried out this activity:
    U.S. Geological Survey
    Attn: Brian D. Andrews
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 ext. 2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Data sources used in this process:
    • CrossSound_2015_bathy_10m_UTM08_WGS84_WGS84
    • NoyesCyn_2017_2018_30m_bathy_UTM08_WGS84
    • 2016_625_FA_Reson7160_Bathymetry_10m
    • QC_Fault_NRC_UTM08_30m
    • SKQ201611T_30m
    • KM0514_30m
    Data sources produced in this process:
    • GridName_Source.shp
    Date: 22-Jan-2021 (process 2 of 2)
    STEP 2: MERGE INDIVIDUAL SOURCE POLYGONS INTO ONE SHAPEFILE
    The six individual polygon shapefiles were merged into one shapefile using the "Merge" tool in ArcGIS Pro (v. 2.7). The order of source shapefiles used during the merge process was the same as the mosaic process used to create the Regional 30-meter grid. After the merge process, and new Attribute "Source" as added to the attribute table and populated to record the source of each feature in the shapefile. Data sources used in this process:
    • CrossSound_2015_bathy_10m_UTM08_WGS84_WGS84.shp
    • 2016_625_FA_Reson7160_Bathymetry_10m.shp
    • NoyesCyn_2017_2018_30m_bathy_UTM08_WGS84.shp
    • QC_Fault_NRC_UTM08_30m.shp
    • SKQ201611T_30m.shp
    • KM0514_30m.shp
    Data sources produced in this process:
    • QueenCharlotteFault_Regional_Bathymetry_Source.shp
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
    The horizontal accuracy of these data is dependent on the source survey methods and is estimated at 10 to 20 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    overlaps exists between the 6 features in this polygons shapefile
  5. How consistent are the relationships among the observations, including topology?
    This shapefile records the spatial extent of the 6 individual grids used as source files for the regional bathymetric terrain model. The shape of each polygons is based on the grid resolution of the input grid: either 10, or 30 meters.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints None
Use_Constraints Public domain data from the U.S. Government are freely re-distributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. These data are not to be used for navigation.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center
    Denver, CO

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? QueenCharlotteFault_Regional_Bathymetry_Source.zip: ZIP file contains the polygon shapefile (QueenCharlotteFault_Regional_Bathymetry_Source.shp), QueenCharlotteFault_Regional_Bathymetry_Source.jpg browse graphic, and the associated FGDC CSDGM metadata in XML format.
  3. What legal disclaimers am I supposed to read?
    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    To utilize this data, the user must have software capable of reading and Esri shapefile

Who wrote the metadata?

Dates:
Last modified: 19-Mar-2024
Metadata author:
Brian D. Andrews
U.S. Geological Survey
Geographer
384 Woods Hole Rd.
Woods Hole, MA
USA

508-548-8700 x2348 (voice)
508-457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240319)
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9YGDHIQ/QueenCharlotteFault_Regional_Bathymetry_Source_meta.faq.html>
Generated by mp version 2.9.51 on Wed Jun 26 15:25:12 2024