[GRASS5] [bug #2372] (grass) display of vector fields

[Request Tracker]

this bug's URL: http://intevation.de/rt/webrt?serial_num=2372
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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 

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