High Definition Geomagnetic Model 2020

Metadata Updated: November 12, 2020

The High Definition Geomagnetic Model (HDGM) is a global, high resolution model of the Earth's geomagnetic main and crustal field, providing magnetic field values (total field, dip, and declination) at any point above or below the Earth's surface. Well planners can use HDGM to compute magnetic reference values at any point, as well as easily integrate HDGM into their directional drilling software. HDGM is updated annually to correctly model secular changes in the geomagnetic field.

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 May 14, 2020
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) November 15, 2019 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NGDC MGG Geophysical Models

Graphic Preview

Declination contour maps that compare HDGM to global magnetic field models

Additional Metadata

Resource Type Model
Metadata Date May 14, 2020
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) November 15, 2019 (publication)
Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
Contact Email
Guid gov.noaa.ngdc:HDGM2020
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: NCEI Geomagnetic Modeling Team. 2019: High Definition Geomagnetic Model 2020. 1. NOAA National Centers for Environmental Information. Accessed [date]., The High Definition Geomagnetic Model is available to the public, but requires payment to recoup the cost of model development, custom software creation and testing, as well as customer service efforts. For more information please contact hdgm.support@noaa.gov
Bbox East Long 180
Bbox North Lat 90
Bbox South Lat -90
Bbox West Long -180
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Declination contour maps that compare HDGM to global magnetic field models
Graphic Preview File https://www.ngdc.noaa.gov/geomag/HDGM/images/hdgm_brazil.jpg
Graphic Preview Type JPG
Licence Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Harvester True
Temporal Extent Begin 1900-01-01
Temporal Extent End 2020-12-31

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