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    • AIS data

    Metadata Updated: October 19, 2024

    Automatic identification system (AIS) data are used to identify and track vessels for various purposes (primarily navigational safety). These data can be used to study vessel traffic, such as ship routing and speed over ground (SOG). Source data were obtained from the United States Coast Guard Navigation Center (USCG NAVCEN) for the period from June 2008 to December 2015. Derived data resulting from the processing of the source data are described here. This data set presents annual raster data (1 square kilometer grid size) off California from 2008-2015 for cumulative ship traffic density (kilometers/day) and mean SOG (knots; distance-weighted). The universe of data is limited to vessels with a length greater than or equal to 80 meters. The data are analyzed in three groups: freight vessels (container, general cargo, bulk carrier, refrigerated cargo, vehicle carrier, etc.), tanker vessels (crude oil, chemical/products, liquid petroleum gas, etc.) and all vessels (the previously noted vessels, plus passenger vessels and other vessel classes). The data are contained in a file geodatabase format as raster data sets. Metadata for the overall data set are contained at the level of the file geodatabase. The data were generated and used for a research article (Moore et al. 2018): Moore, T.J., Redfern, J.V., Carver, M., Hastings, S., Adams, J.D., Silber, G.K., 2018. Exploring Ship Traffic Variability off California. Ocean and Coastal Management. https://doi.org/10.1016/j.ocecoaman.2018.03.010 See this manuscript for more information on the data description, issues, and processing methods.

    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 February 29, 2024
    Metadata Created Date October 19, 2024
    Metadata Updated Date October 19, 2024
    Reference Date(s) 2017 (creation), 2018-03 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NMFS SWFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date February 29, 2024
    Metadata Created Date October 19, 2024
    Metadata Updated Date October 19, 2024
    Reference Date(s) 2017 (creation), 2018-03 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:54048
    Access Constraints Cite As: Southwest Fisheries Science Center, [Date of Access]: AIS data [Data Date Range], https://www.fisheries.noaa.gov/inport/item/54048., Access Constraints: No constraints for access to data that are published in the Mendeley Data repository., Use Constraints: If these data are used, please make reference to the following citations: Moore, T.J., Redfern, J.V., Carver, M., Hastings, S., Adams, J.D., Silber, G.K., 2018. Exploring ship traffic variability off California. Ocean & Coastal Management 163, 515-527. DOI: 10.1016/j.ocecoaman.2018.03.010 Moore, T.J., 2018. Vessel density and vessel speed data off California: 2008-2015, Mendeley Data, v1. DOI: 10.17632/4tgwv45bz8.1
    Bbox East Long -116.6
    Bbox North Lat 42
    Bbox South Lat 30.5
    Bbox West Long -128.9
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id e631ac21-4c87-4c00-ba1d-b67f7a47cb59
    Harvest Source Id bc62ff6c-c119-4409-94c7-7dd202b24462
    Harvest Source Title NMFS SWFSC
    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 Source data should be obtained from the data provider (USCG).
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-128.9, 30.5], [-116.6, 30.5], [-116.6, 42.0], [-128.9, 42.0], [-128.9, 30.5]]]}
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2008
    Temporal Extent End 2015

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