Polygon shapefile of data sources used to create a composite multibeam bathymetry surface of the central Cascadia Margin offshore Oregon

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Frequently anticipated questions:

What does this data set describe?

Title:
Polygon shapefile of data sources used to create a composite multibeam bathymetry surface of the central Cascadia Margin offshore Oregon
Abstract:
Data from various sources, including 2018 and 2019 multibeam bathymetry data collected by the National Oceanic and Atmospheric Administration (NOAA) and the U.S. Geological Survey (USGS) were combined to create a composite 30-m resolution multibeam bathymetry surface of central Cascadia Margin offshore Oregon. These metadata describe the polygon shapefile that outlines and identifies each publicly available bathymetric dataset. The data are available as a polygon shapefile.
Supplemental_Information:
Additional information about the USGS field activities from which some of these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-642-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-636-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.
  1. How might this data set be cited?
    Dartnell, Peter, Watt, Janet T., Hill, Jenna C., and Conrad, James E., 20231130, Polygon shapefile of data sources used to create a composite multibeam bathymetry surface of the central Cascadia Margin offshore Oregon: data release DOI:10.5066/P9PERGFK, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Dartnell, Peter, Watt, Janet T., Hill, Jenna C., and Conrad, James E., 2023, Composite multibeam bathymetry surface and data sources of the central Cascadia Margin offshore Oregon: data release DOI:10.5066/P9PERGFK, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

    Other_Citation_Details:
    Suggested Citation: Dartnell, P., Watt, J.T., Hill, J.C., and Conrad, J.E., 2023, Composite multibeam bathymetry surface and data sources of the central Cascadia Margin offshore Oregon: U.S. Geological Survey data release, https://doi.org/10.5066/P9PERGFK.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -126.156
    East_Bounding_Coordinate: -124.093
    North_Bounding_Coordinate: 46.607
    South_Bounding_Coordinate: 43.408
  3. What does it look like?
    CentralCascadia_composite_bathymetry_data_sources_QV (JPEG)
    Quick view image of the central Cascadia Margin composite multibeam bathymetry data source polygons
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 1998
    Ending_Date: 2021
    Currentness_Reference:
    ground condition at time data were collected.
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: polygon Shapefile
  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 (46)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 10
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -123.00000
      Latitude_of_Projection_Origin: 0.00000
      False_Easting: 500000.0
      False_Northing: 0.00
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.1
      Ordinates (y-coordinates) are specified to the nearest 0.1
      Planar coordinates are specified in Meters
      The horizontal datum used is NAD83.
      The ellipsoid used is GRS80.
      The semi-major axis of the ellipsoid used is 6378137.00.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    CentralCascadia_composite_bathymetry_UTM10_NAD83_data_sources.shp
    Table containing attribute information associated with the data set. (Source: USGS)
    FID
    Internal feature number. (Source: Esri)
    Range of values
    Minimum:0
    Maximum:45
    Shape
    Feature geometry. (Source: Esri) shape defining the features.
    ObjectID
    Feature geometry. (Source: Esri) polygon number
    Ship
    name of the survey vessel (Source: USGS) name of the survey vessel
    Multibeam
    multibeam system used to collect data (Source: USGS) type and model of various instrument(s) used to collect the multibeam data on each cruise
    Year
    Year of data collection (Source: USGS)
    Range of values
    Minimum:1998
    Maximum:2021
    Organizati
    Group, Organization, Agency, Program, or Project that collected the data (Source: USGS) Group, Organization, Agency, Program, or Project that collected the data
    Cruise_ID
    Cruise ID (Source: USGS) unique cruise identification assigned by each institution
    Source
    description of data source including URL (Source: USGS) description of data source including URL
    Diff_Bathy
    Overlapping datasets used in difference calculations (Source: USGS) Overlapping datasets used in difference calculations
    Diff_mean
    Mean difference between overlapping datasets (Source: USGS)
    Range of values
    Minimum:-5.52
    Maximum:8.41
    Diff_stddv
    Standard deviation between overlapping datasets (Source: USGS)
    Range of values
    Minimum:1.28
    Maximum:15.79
    Entity_and_Attribute_Overview: zipped file of polygon shapefile
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Peter Dartnell
    • Janet T. Watt
    • Jenna C. Hill
    • James E. Conrad
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

In 2018 and 2019 the NOAA ships Rainier and Fairweather collected multibeam bathymetry data in 4 areas along the central Cascadia Margin offshore Oregon as part of a cooperative project between the U.S. Geological Survey, Pacific Coastal and Marine Science Center and NOAA. These regions were combined with other publicly available multibeam bathymetry data. The surface was generated to assist research projects studying offshore geohazards including mapping faults, submarine landslides, sediment transport pathways, and seafloor seeps. These data are not intended to be used for navigation.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2022 (process 1 of 7)
    The Ocean Exploration Trust's, Nautilus Exploration Program collected multibeam echosounder data along the central Cascadia Margin between 2016 and 2022 (OET survey ID's NA072, NA080, NA082, NA088, NA095, NA122, NA128, NA130). The U.S. Geological Survey Pacific Coastal and Marine Science Center requested and received both raw line files and processed grids as well as processed raw line files avaiable from NOAA, National Centers for Environmental Information, https://ngdc.noaa.gov/mgg/bathymetry/multibeam.html). Raw survey line files were imported and processed in Caris HIPS and SIPS software (version 11). The data were gridded into 30-m surfaces and exported as geoTIFF's or ASCIIRaster files and imported into ArcMap.
    Date: 2022 (process 2 of 7)
    Publicly available multibeam echosounder data available from NOAA, National Centers for Environmental Information were downloaded from https://ngdc.noaa.gov/mgg/bathymetry/multibeam.html. Survey IDs include TN149, TN173, TN265, KM1812, FK180731, FK180824, FK190612, RR1807, SKQ201607, SMGL2104, MGL1216, AT26-16, AT26-17, TN312. The raw survey and transit line files were imported and processed in Caris HIPS and SIPS software (version 11). The data were gridded into 30-m surfaces and exported as geoTIFF or ASCIIRaster files and imported into ArcMAP.
    Date: 2021 (process 3 of 7)
    Processed multibeam bathymetry grids from Monterey Bay Aquarium Research Institute (MBARI) were downloaded as ASCIIRaster files from http://www3.mbari.org/data/mapping/NorCal_Oregon_Margin/oregon_a.htm(OregonMarginB-I.asc). The bathymetry data were imported into ArcMap and projected from geographic coordinates to UTM, zone 10, WGS84 coordinates. The UTM grid was reprojected to UTM, zone 10, NAD83 coordinates and resampled to 30-m resolution.
    Date: 2021 (process 4 of 7)
    Accessed processed multibeam bathymetry data collected by the USGS during field activity 2014-607-FA. Cochrane, G.R., Dartnell, P., Hemery, L.G., and Hatcher, G., 2017, Data release for USGS field activity 2014-607-FA, Oregon OCS seafloor mapping: selected lease blocks relevant to renewable energy (ver. 2.0, July 2017), U.S. Geological Survey data release, https://doi.org/10.5066/F7V40S8V.
    Date: 2022 (process 5 of 7)
    In 2018 and 2019 the NOAA ships Rainier and Fairweather mapped four regions along the central Cascadia Margin (NOAA survey IDs H13119, H13137, H13118, W00474) using Kongsberg EM-710 multibeam echosounders. These bathymetry surfaces are available from NOAA, National Centers for Environmental Information and were downloaded from https://ngdc.noaa.gov/mgg/bathymetry/multibeam.html as BAG files. The BAG files were imported into Caris HIPS and SIPS, version 11 and converted to LAS files. The files were imported into ArcMap, version 10.8.1 and converted to grids.
    Date: 2022 (process 6 of 7)
    If needed, the previously described bathymetry grids were projected to a common horizontal datum (NAD83) using the "Project Raster" tool in ArcToolbox. Also, if needed, the grids were downsampled to 30-m spatial resolution using the "Resample" tool in ArcMap using the bilinear resampling technique. The grids were then merged together using the "Mosaic to New Raster" tool in ArcMap using the "first" mosaic operator. Priority was given to recent dedicated surveys, then older dedicated surveys followed by cleaner transit data and then noisier transit data. The merged grid was exported as a geoTIFF file.
    Date: 2023 (process 7 of 7)
    Polygons were hand drawn around each individual multibeam bathymetry surface and attributes were added to each polygon including ship name, cruise ID, multibeam system, year, data source URL, and difference calculations.
  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?
    Polygons were hand drawn around each individual multibeam bathymetry surface.
  2. How accurate are the geographic locations?
    The composite multibeam bathymetry surface was generated from a combination of dedicated multibeam surveys, processed bathymetry surfaces received from other institutions, as well as transit data (ancillary data collected while a ship was underway). The bathymetry data were collected over a span of nearly 18 years using a variety of models of multibeam echosounders, GPS systems, position and motion compensation systems, sound velocity profilers, and tide measurements. Polygons were hand drawn around each individual multibeam bathymetry surface.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    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.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical accuracy tests were conducted.

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 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 originators of the dataset and in products derived from these data. Portions of the map used data provided by the Ocean Exploration Trust’s Nautilus Exploration Program, Cruises NA072, NA080, NA082, NA088, NA095, NA122, NA128, NA130. This composite bathymetry grid is intended for research purposes only, studying the seafloor morphology of the central Cascadia margin. The bathymetry grid is not intended to be used for navigation.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - CMGDS
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov
  2. What's the catalog number I need to order this data set? These data are available in ESRI shapefile format contained in a single zip file (CentralCascadia_composite_bathymetry_UTM10_NAD83_data_sources.zip) accompanied by CSDGM FGDC-compliant metadata.]
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: Downloadable zip file contains a shapefile of multibeam sources. in format Shapefile (version ArcMap (version 10.3.1)) Esri polygon shapefile Size: 0.3968
      Network links: https://doi.org/10.5066/P9PERGFK
    • Cost to order the data: None.

  5. What hardware or software do I need in order to use the data set?
    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 a shapefile file.

Who wrote the metadata?

Dates:
Last modified: 30-Nov-2023
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P9PERGFK/CentralCascadia_composite_bathymetry_UTM10_NAD83_data_sources_metadata.faq.html>
Generated by mp version 2.9.51 on Fri Dec 15 14:16:32 2023