[GRASS-user] Display arrows on basis of vector points

[David Finlayson]

Do you know about d.rast.arrow? It takes a grid of directions and a
optional grid of magnitudes and can generate vector fields. I use it
to plot wave and current fields.

David

On 5/23/06, Dylan Beaudette <dylan.beaudette at gmail.com> wrote:
> On Tuesday 23 May 2006 09:03, Bernhard Reimar Hoefle wrote:
> > Hi!
> > Does anybody know if it's possible to display arrows starting from vector
> > points which have a x_shift and y_shift attribute for their
> > direction/length.
> >
> > I would like to use it for displaying flow velocities of glaciers!
> >
> > Bernhard Hoefle
> >
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>
> Hi,
>
> I am not sure if this is currently possible outside of a custom script
> involving d.mapgraph -- but it is quite simple to do in R with the arrow()
> function.
>
> Search the CRAN website for examples.
>
> Cheers,
>
> --
> Dylan Beaudette
> Soils and Biogeochemistry Graduate Group
> University of California at Davis
> 530.754.7341
>
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-- 
David Finlayson