[GRASSLIST:8618] Re: New d.rast.arrow capabilities

[Michael Barton]

I agree that this upgrade of d.rast.arrow has a LOT of potential for
visualization of a wide array of data. It's exciting to see this and a
number of other very sophisticated new modules appearing for GRASS over the
past year.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ 85287-2402

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton



> From: David Finlayson <david.p.finlayson at gmail.com>
> Date: Thu, 13 Oct 2005 17:48:50 -0700
> To: grass <GRASSLIST at baylor.edu>
> Subject: [GRASSLIST:8615] New d.rast.arrow capabilities
> 
> I filed a bug about d.rast.arrow not saving a command to the monitor
> history which prevented the drawing of arrows after zooming or when
> using d.out.png with arrows. Hamish Bowman took a look at it and gave
> d.rast.arrow a complete make-over. Now instead of just pointing in 8
> directions (d.rast.arrow was originally written to visualize flow
> directions from D8 algorithms), the arrows are fully 360 degrees and
> scaled by magnitude. We've now got a good start towards a general
> vector plotting tool in grass. Talk about support!
> 
> Here's an example from my research (beach geomorphology) how you might
> use it (1 Mb):
> 
> http://students.washington.edu/dfinlays/beaches/images/wave_energy.png
> 
> Its a plot of beach elevation change and the arrows are wave energy fluxes.
> 
> You can get this from CVS.
> 
> Thanks Hamish!
> 
> 
> --
> David Finlayson
> Marine Geology & Geophysics
> School of Oceanography
> Box 357940
> University of Washington
> Seattle, WA  98195-7940
> USA
> 
> Office: Marine Sciences Building, Room 112
> Phone: (206) 616-9407
> Web: http://students.washington.edu/dfinlays