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

> Yuan,
> So when you run my bundle, do you get the same result?
> -Rich
> 

When I ran the bundle, I got even worst result. My feeling is that those 
missing vectors were likely associated with very small values. If you draw wind 
barb, you will get every points.


Yuan
> On Thu, Jul 2, 2015 at 11:54 AM, Unidata IDV Support
> <address@hidden> wrote:
> >> 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
> 
> 
> 
> --
> 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