[Proj] Converting between true north, grid north, and magnetic north

[Chen Barnoy]

Hi,

Is there a way to convert between grid north, true north and magnetic north
in Proj4 or another library?

Cheers,
Chen
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.maptools.org/pipermail/proj/attachments/20180130/15367d03/attachment.htm