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[IDV #WHS-790529]: Issue with bottom velocity vectors



> We are running 5.1u2.   Did you look at the bundle?  All your
> questions are answered by the bundle, no?


Rich,
        I have no problem getting the result similar to the python output. See 
the attached. However, your bundle does look very strange, almost like some 
kind of 
filter working there. I will check and let you know.


Yuan
> 
> On Wed, Jul 1, 2015 at 5:34 PM, Unidata IDV Support
> <address@hidden> wrote:
> > Rich,
> >
> > Here are a few comments:
> >
> > - Update your IDV to the latest version (5.1u2, this will yield no 
> > improvement
> > probably, but it is usually best to work with the latest version of the 
> > IDV).
> >
> > - For clarification, the flow vectors are supposed to be derived from what? 
> > The
> > data contain two u and v fields (momentum versus stokes). Which one are you
> > interested in? (I wonder if there is confusion/mismatches going on here.)
> >
> > - Are you sure you are looking at the same geographic extents? The IDV is
> > displayed roughly over NY harbor. I cannot tell where the Python plot is
> > located.
> >
> > - I wonder if there are numerical errors going on. One of the Derived 
> > Fields in
> > the IDV is "Speed (from U & V)".  When you do a "Value Plot" of these data, 
> > do
> > you get numbers you expect?
> >
> > - Experiment with the Flow Vector Control in the IDV Dashboard, Displays 
> > Tab.
> >
> > Keep us up-to-date on your progress.
> >
> > Best,
> >
> > Unidata IDV Support
> >
> >
> >
> >
> >> IDV Gurus,
> >>
> >> We are struggling to get bottom velocity vectors displayed properly in
> >> IDV (5.0u2) for a Hurricane Sandy ocean simulation.
> >>
> >> The bottom velocity for 2012-10-30 00:00:00 should look like the 1st
> >> attached image (plotted in python using this notebook):
> >> http://nbviewer.ipython.org/gist/rsignell-usgs/a85e68a71933910a171a
> >>
> >> but instead it looks like the 2nd attached image.
> >>
> >> In the IDV image you can see that the flow at the coast is the wrong
> >> direction, and there are those strange black areas with no vectors.
> >>
> >> What is going on here?
> >>
> >> I'm attaching the bundle so you can recreate this yourself.
> >> --
> >> Dr. Richard P. Signell   (508) 457-2229
> >> USGS, 384 Woods Hole Rd.
> >> Woods Hole, MA 02543-1598
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: WHS-790529
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> >
> 
> 
> 
> --
> Dr. Richard P. Signell   (508) 457-2229
> USGS, 384 Woods Hole Rd.
> Woods Hole, MA 02543-1598
> 
> 


Ticket Details
===================
Ticket ID: WHS-790529
Department: Support IDV
Priority: Normal
Status: Open

Attachment: rimage.gif
Description: GIF image


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