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    • U.S. West Coast Groundfish Bottom Trawl Survey (sampling grid)

    Metadata Updated: July 12, 2025

    This layer is intended to represent the geographic extent of NOAA Fisheries’ U.S. West Coast Groundfish Bottom Trawl Survey. The U.S. West Coast Groundfish Bottom Trawl Survey started in 1998 and is led by NMFS Northwest Fisheries Science Center. This survey provides long-term time-series data for the management of West Coast groundfishes as well as coastwide environmental sampling for monitoring change within the California Current Ecosystem. The bottom trawl survey covers West Coast waters (55-1280 meters [30-700 fathoms]) twice annually using a trawl net and a random sampling design, stratified by depth and latitude. The survey collects fishery-independent data on abundance, distribution, and biology of most species included in the west coast groundfish management plan. Weight and measurements are collected from vertebrates and invertebrates alongside various biological samples. Samples collected include otoliths and other structures for aging, finclips for genetics, gonads for reproductive analysis, and stomach contents and tissue samples for diet/stable isotope analysis. Oceanographic sensors are affixed to the trawl net, collecting data such as temperature, salinity, and dissolved oxygen for each trawl at depth.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date July 2, 2025
    Metadata Created Date July 12, 2025
    Metadata Updated Date July 12, 2025
    Reference Date(s) May 1, 2025 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NMFS NWFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date July 2, 2025
    Metadata Created Date July 12, 2025
    Metadata Updated Date July 12, 2025
    Reference Date(s) May 1, 2025 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:75764
    Access Constraints Cite As: Northwest Fisheries Science Center, [Date of Access]: U.S. West Coast Groundfish Bottom Trawl Survey (sampling grid) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/75764., Use Constraints: *** No Warranty*** The user assumes the entire risk related to its use of these data. NMFS is providing these data "as is," and NMFS disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. No warranty expressed or implied is made regarding the accuracy 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. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate dataset limitations, restrictions or intended use. In no event will NMFS be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or lost profit resulting from any use or misuse of this data.
    Bbox East Long -114.791625
    Bbox North Lat 48.5111
    Bbox South Lat 30.263765
    Bbox West Long -129.464302
    Coupled Resource
    Frequency Of Update asNeeded
    Harvest Object Id 07a6afda-d466-4a7b-84bf-91c924a15b66
    Harvest Source Id ba43549f-8268-499d-bec8-91b164cb168f
    Harvest Source Title NMFS NWFSC
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage Data were loaded from source data into ArcGIS Pro and a definition query was used in order to isolate the survey of interest, then published to ArcGIS Online.
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-129.464302, 30.263765], [-114.791625, 30.263765], [-114.791625, 48.5111], [-129.464302, 48.5111], [-129.464302, 30.263765]]]}
    Progress underDevelopment
    Spatial Data Service Type
    Spatial Reference System EPSG::3857
    Spatial Harvester True
    Temporal Extent Begin 2003-06-24T00:00:00Z
    Temporal Extent End 2024-10-15T00:00:00Z

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