Hi,
When trying to do some vector plots in a y-z we noticed some problems
with the scaling when using the /ASPECT qualifier which is supposed to
correct
for different scales.
Here's a simple illustration.
russ-hf% ferret -nojnl
NOAA/PMEL TMAP
FERRET v6.71
Linux 2.6.32-131.6.1.el6.x86_64 64-bit - 08/08/11
24-Nov-11 14:39
yes? def axis/z=5:95:10/units=meters/depth zax
yes? def axis/y=-5:5:1/units=degrees_n yax
yes? def grid/y=yax/z=zax myg
yes? let w=1e-3+0*y[g=myg]+0*z[g=myg] ! Constant 1mm/s
yes? let v=y[g=myg]+0*z[g=myg] ! Vary with latitude
vec/asp v,w ! w varies with lat! Wrong!
It looks like a different scaling is being applied at point.
More generally we found the scaling to depend on the magnitude of V
The same problem appears in the x-z plane.
Russ
Attachment:
vecplot.gif
Description: GIF image
