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Maps of Magnetic Elements from the WMM2020. Contour maps were created for each of the seven magnetic elements (D, I, H, X, Y, Z, and F) and for their secular variation (rate of change).
This free utility will generate a PNG or SVG file representing a properly formatted declination diagram for a specific map. Background. In cartography, a declination diagram is used to provide a graphic representation of the variations between true north, grid north, and magnetic north on a map.
Magnetic declination (variation) calculator based on the IGRF magnetic field model. Estimates magnetic delination world-wide from 1900 - present.
2 lip 2022 · World Magnetic Model 2020 Calculator. Use the tool below to compute values for the geomagnetic field and secular variation for a given set of coordinates and date. This calculator uses the World Magnetic Model as released in Dec 2019.
The difference between true north and magnetic north is called magnetic declination or magnetic variation. Some sources also erroneously refer to it as magnetic deviation. It's essential to take this phenomenon into account when navigating with a compass.
24 lip 2024 · WMM Magnetic Declination (2020-2025) Enter Location: (latitude 90S to 90N, longitude 180W to 180E). See Instructions for details. The declination is 00° 00' changing at a rate of 00° 00' /year.