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    • Enhanced Magnetic Model 2015

    Metadata Updated: September 22, 2023

    The Enhanced Magnetic Model (EMM) extends to degree and order 720, resolving magnetic anomalies down to 56 km wavelength. The higher resolution of the EMM results in significantly improved pointing accuracy than the World Magnetic Model (WMM), which uses spherical harmonic representation to degree and order 12, resolving the magnetic field at 3000 km wavelength. The EMM model provides the magnetic field vector at any desired location and altitude close to and above the Earth's surface.

    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 September 22, 2023
    Metadata Updated Date September 22, 2023
    Reference Date(s) May 15, 2015 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NGDC MGG Geophysical Models

    Other Data Resources

    Graphic Preview

    Declination Comparison of WMM and EMM

    Additional Metadata

    Resource Type Model
    Metadata Date May 14, 2020
    Metadata Created Date September 22, 2023
    Metadata Updated Date September 22, 2023
    Reference Date(s) May 15, 2015 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ngdc.mgg.geophysical_models:EMM2015
    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: Chulliat, A.. P. Alken. Nair, A. Woods. S. Maus. 2015: Enhanced Magnetic Model 2015. 1. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V56971HV. Accessed [date].
    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 Comparison of WMM and EMM
    Graphic Preview File https://www.ngdc.noaa.gov/geomag/EMM/img/dec_WMM_EMM.jpg
    Graphic Preview Type JPG
    Harvest Object Id 74e60388-a62b-4d39-a696-988b349a359a
    Harvest Source Id 5ed471dc-74d7-4fff-9550-9d3d373a7a15
    Harvest Source Title NGDC MGG Geophysical Models
    Licence Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
    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
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2000-01-01
    Temporal Extent End 2019-12-31

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