Who publishes Declination Calculator?

National Centers for Environmental Information, part of National Oceanic and Atmospheric Administration, Department of Commerce, publishes this dataset on Data.gov.

How often is it updated?

The publisher does not list a schedule. The last update was on 12/01/2009.

How do I download it?

Use the official source link above to view or request the data.

Checked Oct 30, 2026

Federal dataMaps & Geospatial

Declination Calculator

Name: Declination Calculator
Creator: National Centers for Environmental Information
Published: 2009-12-01T00:00:00.000Z

Published by National Centers for Environmental Information · Updated 12/01/2009

Official source

Last updated: 12/01/2009; First published 12/01/2009
Update frequency: Not listed
Formats: Web only
Coverage: Nationwide; Federal data

About this dataset

Declination is calculated using the current International Geomagnetic Reference Field (IGRF) model. 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.

Files and access

Links open the official government source

Metadata Landing Pagencei.noaa.govWeb page
Magnetic Declination Calculatorngdc.noaa.govWeb page
GCMD Keyword Forum Pageforum.earthdata.nasa.govWeb page
NCEI Contact Informationncei.noaa.govWeb page

Links open outside websites we do not control.

Frequently asked questions

Who publishes Declination Calculator?: National Centers for Environmental Information, part of National Oceanic and Atmospheric Administration, Department of Commerce, publishes this dataset on Data.gov.
How often is it updated?: The publisher does not list a schedule. The last update was on 12/01/2009.
How do I download it?: Use the official source link above to view or request the data.

Where this catalog comes from

Data.gov CatalogU.S. General Services Administration
State and local open data portalsSocrata Discovery API
State and city CKAN portalsCalifornia, Virginia, Boston, Houston and more
Government ArcGIS Hub sitesCity and county GIS data

Catalog checked 10/24/2026

We list dataset descriptions only. Downloads and APIs link straight to the official government source, which holds the current version and its terms of use.

Source: Data.gov · Last updated 10/24/2026 · Listing only; the data stays with the publisher