High Definition Geomagnetic Model 2020

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2021-11-15T00:00:00.000+00:00

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.

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Complete Metadata

describedByType	application/octet-steam
identifier	gov.noaa.ngdc:HDGM2022
issued	2021-11-15T00:00:00.000+00:00
language	[]
rights	otherRestrictions
spatial	180.0,-90.0,-180.0,90.0
temporal	1900-01-01T00:00:00+00:00/2022-12-31T00:00:00+00:00

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