[GRASS-dev] Script for converting degrees clockwise from North to GRASS convention

[Markus Metz]

On Wed, Jan 23, 2013 at 4:55 PM, Moritz Lennert
<mlennert at club.worldonline.be> wrote:
>
> In the interest of other users, it might be better to create a generic angle
> transformation tool, which just transforms the angle of origin to its
> equivalent in the other convention without trying to interpret the meaning
> of that angle. However, it could be an option to include a flag that
> "reverses" the angles (i.e. transform a North angle into a South angle) in
> order to go from (in your wind example) origin to destination.
> In terms of implementation, the easiest would probably be to chose one
> internal convention for the module and then code transformation from any
> other convention to and from that internal convention.

See also Glynn's answer in a previous post [0]

Markus M

[0] http://lists.osgeo.org/pipermail/grass-user/2009-January/048460.html