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Declination results are typically accurate to 30 minutes of arc, but environmental factors can cause magnetic field disturbances. The calculator provides an easy way for you to get results in HTML, XML, CSV, or JSON programmatically (API). Registration is required to access this service.
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Magnetic declination (variation) calculator based on the IGRF magnetic field model. Estimates magnetic delination world-wide from 1900 - present.
NCEI provides access to the DoD software and current WMM and WMM online calculator. The software computes the main components of the geomagnetic field and their annual changes. The programs are designed to be used in demand mode. The software is available as C source code. The model file, WMM.COF (format specification), is available in the same ...
Compute Earth's Magnetic Field Values. On-line calculators to estimate current and past values of the magnetic field. If you want only the magnetic declination (variation) for a single day between 1900-present, visit our declination calculator.
Calculate Declination. Lookup Latitude / Longitude. Enter a street address, street name, or street intersection. For best results, include as much location information as possible with the street address in your search, such as city, state, zip code. Location:
26 maj 2024 · Our calculator will help you find the magnetic declination for your specific location and date. A positive declination (+D) means that your compass will point east of north. A negative declination (-D) means that your compass will point west of north.
Activate sensors ... Latitude: S N Longitude: