Details Ticket 2372


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Serial Number 2372
Subject display of vector fields
Area wish
Queue grass
Requestors webmaster@weather.nmsu.edu
Owner none
Status resolved
Last User Contact Mon Feb 5 22:08:17 2007 (2 yr ago)
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Mon Feb 5 22:08:17 2007 (2 yr ago)
Created Fri Apr 2 20:13:44 2004 (4 yr ago)

Transaction History Ticket 2372


Fri, Apr 2 2004 20:13:44    Request created by guest  
Subject: display of vector fields

Platform: GNU/Linux/i386
grass binary for platform: Compiled from Sources
GRASS Version: 5.0.2

It would be nice to have a display module for vector fields: 
it takes two rasters as arguments (one for direction, one for magnitude), and
it 
draws arrows representing the direction and magnitude at each point (probably
only good for low resolution rasters). 
That way you could use it to get a nice visual representation of wind or water
flow, and similar things. 
It might also be a good thing to add the resolution drop into the program (instead
of depending on low resolution rasters) so that you could display a relatively
high 
resolution DEM and then overlay a vector field representing water flow (or wind,
or whatever) at a lower resolution so that there's room to draw the arrows without
them interfering with each other 
Mon, Feb 5 2007 22:08:18    Status changed to resolved by mneteler  
Mon, Feb 5 2007 22:08:17    Mail sent by mneteler  
Hi,

d.rast.arrow in GRASS 6 is most likely doing the job.

Markus
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