Compass rose: use the newest world magnetic model

OpenSeaMap / online_chart

OpenSeaMap fullscreen browser chart.

http://map.openseamap.org/

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Compass rose: use the newest world magnetic model #137

Open wschildbach opened 4 years ago

wschildbach commented 4 years ago

NOAA has released their newest model WMM2020 (see https://www.ngdc.noaa.gov/geomag/WMM/). Our coefficients need to be updated to use the newest model.