Marine Trackline Geophysical Database

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.

Data and Resources

Additional Info

Field Value
Last Updated September 18, 2017, 15:48
Created June 10, 2017, 18:17
access_constraints ["Cite As: NOAA National Geophysical Data Center (1977): Marine Trackline Geophysical Database. NOAA National Centers for Environmental Information. doi:10.7289/V5CZ35DR"]
bbox-east-long 180.00
bbox-north-lat 90.00
bbox-south-lat -90.00
bbox-west-long -180.00
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "1977-01-01"}]
frequency-of-update irregular
guid gov.noaa.ngdc:G00129
licence ["While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.", "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."]
metadata-date 2017-09-06
progress onGoing
resource-type dataset
responsible-party [{"name": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
spatial-data-service-type ArcGIS Map Service
spatial_harvester true
temporal-extent-begin 1939-01-01