[postgis-users] magnetic bearing to true bearing

[James Klassen]

This will calculate the declamation.  It would take some C coding to
integrate it with PostgreSQL.

https://www.ngdc.noaa.gov/geomag/WMM/soft.shtml

On Fri, Feb 7, 2020, 08:14 <paul.malm at lfv.se> wrote:

> Hi, list!
>
> I’m writing a program reading a file and creating graphical objects.
>
> I have a starting point (lat/lon WGS 84), a length (m) and a magnetic
> bearing (degrees).
>
> I would like to automatically convert the magnetic bearing to a true
> bearing when they occurs in the file I’m reading.
>
> Is there a converter in PostGis that can be used, or is there another way
> my program can get the declamation?
>
> Kind regard,
>
> Paul
>
>
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