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    • Airborne Gravity Data - Gravity for the Redefinition of the American Vertical Datum (GRAV-D)

    Metadata Updated: March 15, 2024

    Gravity for the Re-definition of the American Vertical Datum (GRAV-D) is a project initiated by NOAA's National Geodetic Survey to collect and monitor gravity data suitable for the re-definition of the vertical datum for at least the United States and territories. Airborne gravity data will be collected from 2008-2022, processed, and released periodically in geographic blocks. Each block is comprised of one or more surveys. The data will be available at http://www.ngs.noaa.gov/GRAV-D/data_products.shtml in ASCII text format. Some data collection has and will be done in conjunction with partners, such as the US Geological Survey, National Geospatial-Intelligence Agency, Bureau of Land Management, and the Naval Research Laboratory.

    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 January 20, 2023
    Metadata Updated Date March 15, 2024
    Reference Date(s) 2013 (creation), 2020 (revision), 2011-07 (publication)
    Frequency Of Update continual

    Metadata Source

    Harvested from NOS NGS

    Other Data Resources

    Graphic Preview

    This is a map depicting GRAV-D data collection efforts in CONUS. GRAV-D also has data in or has plans to collect data in Alaska, Hawaii, Puerto Rico, American Samoa, and Guam. Green blocks are complete and data is available for download. Blue blocks are data that is in processing. Orange blocks have partial data collection. White blocks are planned.

    Additional Metadata

    Resource Type Dataset
    Metadata Date February 29, 2024
    Metadata Created Date January 20, 2023
    Metadata Updated Date March 15, 2024
    Reference Date(s) 2013 (creation), 2020 (revision), 2011-07 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:39698
    Access Constraints Cite As: National Geodetic Survey, [Date of Access]: Airborne Gravity Data - Gravity for the Redefinition of the American Vertical Datum (GRAV-D) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/39698., Access Constraints: None, Use Constraints: Must read and fully comprehend the metadata prior to use, acknowledgment of the Originator when using the data set as a source, data should not be used beyond the limits of the source scale, Distribution Liability: 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.
    Bbox East Long -65
    Bbox North Lat 72
    Bbox South Lat -18
    Bbox West Long -180
    Coupled Resource
    Frequency Of Update continual
    Graphic Preview Description This is a map depicting GRAV-D data collection efforts in CONUS. GRAV-D also has data in or has plans to collect data in Alaska, Hawaii, Puerto Rico, American Samoa, and Guam. Green blocks are complete and data is available for download. Blue blocks are data that is in processing. Orange blocks have partial data collection. White blocks are planned.
    Graphic Preview File https://geodesy.noaa.gov/GRAV-D/images/GRAVD_thumbnail.png
    Harvest Object Id 3ec8549d-ded5-4b11-85b6-5a68c13f919d
    Harvest Source Id ea6e63e6-96bb-4fb1-a72f-b7af08062c83
    Harvest Source Title NOS NGS
    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
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-180.0, -18.0], [-65.0, -18.0], [-65.0, 72.0], [-180.0, 72.0], [-180.0, -18.0]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System EPSG::7909
    Spatial Harvester True
    Temporal Extent Begin 2008
    Temporal Extent End 2022

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