US Historic Declination Calculator

Metadata Updated: January 30, 2017

This programs derives a table of secular change in magnetic declination for a specified point in the conterminous United States. It utilizes the USD polynomial and the IGRF spherical harmonic models. Declination is calculated using the current World Magnetic Model (WMM) or International Geomagnetic Reference Field (IGRF) model. While results are typically accurate to 30 minutes of arc, users should be aware that several environmental factors can cause disturbances in the magnetic field.

Access & Use Information

Downloads & Resources

Dates

Metadata Date August 31, 2015
Metadata Created Date January 30, 2017
Metadata Updated Date January 30, 2017
Reference Date(s) December 1, 2009 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOAA CSW Harvest Source

Graphic Preview

Magnetic Declination map for North America for the year 2010

Additional Metadata

Resource Type Service
Metadata Date August 31, 2015
Metadata Created Date January 30, 2017
Metadata Updated Date January 30, 2017
Reference Date(s) December 1, 2009 (publication)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Access Constraints
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 Magnetic Declination map for North America for the year 2010
Graphic Preview File http://www.ngdc.noaa.gov/geomag/img/DeclinationMap_US.png
Graphic Preview Type PNG
Guid gov.noaa.ngdc.mgg.geophysical_models:US_Historic_Declination_Calculator
Harvest Object Id e3797b3c-bdfb-4a59-bc3e-d501d7b0a981
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
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., Produced by the NOAA National Geophysical Data Center. 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 1750-01-01
Temporal Extent End 2014-12-31

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