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    • Marine Trackline Geophysical Database

    Metadata Updated: January 21, 2025

    This data set contains bathymetry, magnetic, gravity and seismic shot point navigation data collected during marine cruises from 1939 to the present. Coverage is worldwide. These data are stored in the MGD77 exchange format and are available for download in a variety of user selectable formats. One Header record and multiple Data records are available for a particular cruise/leg (port to port operation). The Header record documents both the content and the structure of the subsequent Data records, containing that part of the data that remains invariant throughout the cruise. The Data records present geophysical data (bathymetry, magnetics and gravity) and seismic information (shot-point identification) with a corresponding time and position. Documentation that varies within the cruise is also included with the data records. Data are fully searchable on-line by geographic area, year of cruise, institution, platform, cruise, date or data type.

    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 August 6, 2024
    Metadata Created Date October 31, 2024
    Metadata Updated Date January 21, 2025
    Reference Date(s) 1977 (creation), 2023 (revision), September 15, 2023 (publication)
    Frequency Of Update irregular

    Metadata Source

    Harvested from NGDC Collection

    Other Data Resources

    Graphic Preview

    Map showing a web mercator projection of the trackline web map data discovery portal.

    Additional Metadata

    Resource Type Dataset
    Metadata Date August 6, 2024
    Metadata Created Date October 31, 2024
    Metadata Updated Date January 21, 2025
    Reference Date(s) 1977 (creation), 2023 (revision), September 15, 2023 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ngdc:G00129
    Category Tag 16E15F51 D96E 4051 9124 75665Abdc6Ff ["Arctic Ocean, Sea Ice and Coasts","Arctic"]
    Access Constraints Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Cite as: NOAA National Centers for Environmental Information. 1977: Marine Trackline Geophysical Database. NOAA National Centers for Environmental Information. https://doi.org/doi:10.7289/V5CZ35DR. Accessed [date].
    Bbox East Long 180.00
    Bbox North Lat 90.00
    Bbox South Lat -90.00
    Bbox West Long -180.00
    Coupled Resource
    Frequency Of Update irregular
    Graphic Preview Description Map showing a web mercator projection of the trackline web map data discovery portal.
    Graphic Preview File https://ngdc.noaa.gov/mgg/image/trkmap256x235.gif
    Graphic Preview Type gif
    Harvest Object Id 02129cfd-b6cc-463e-ae26-90dc0847cb65
    Harvest Source Id 5088829e-ee94-4daf-8d22-e38f5358f506
    Harvest Source Title NGDC Collection
    Licence Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.
    Lineage
    Metadata Language
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
    Progress completed
    Spatial Data Service Type ArcGIS Map Service
    Spatial Reference System Through the collection reference systems have vaired with time and ___location. Please see survey level metadata for detailed information.
    Spatial Harvester True
    Temporal Extent Begin 1939-01-01

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