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[IDV #VTX-233380]: wind barbs do not scale correctly



> > HP-
> >
> > The problem with the skip is still where we left it last time.  I asked
> > Yuan and Julien to look into it when they get a chance, however, that
> > might not happen for a while.  I suggest using the stride on the dataset
> > for now.
> >
> > The problem with the large barbs that you can't recreate may be related
> > to a bug that still exists with the flow vectors when the map projection
> > changes.  I've let Unidata know how to fix that, so hopefully they can
> > implement it soon.
> >
> > Don
> >
> 
> Don,
> I cann't see the attached file from HP, I am guessing HP's previous email 
> sent to you directly, if so, can you upload his attached?
> 
> 
> Thanks,
> 

I think we can close this ticket now as Julien checked in the changes.


Yuan
> Yuan
> > On 2/6/11 4:11 AM, HP wrote:
> > > Hi -
> > >
> > > Now that I can access again the download site of the nightlies, I have
> > > retested the attached ascat...nc file (such nc files are stored in
> > > EUMETSAT and NOAA archives):
> > >
> > > On 2011-02-05 21:57, Unidata IDV Support wrote:
> > >>> Rebonjour -
> > >>>
> > >>> With Don's support I have been able to get a new build and have now
> > >>> tested the wind barbs.
> > >>>
> > >>> Using full spatial resolution the barbs scale now much better, though I
> > >>> have to go down to a factor of 1 for a typical wind wind field. So,
> > >>> there is now lee way to make them even smaller. I would suggest that you
> > >>> blow down the vector by a factor of 2 to 4, 3 say.
> > >>
> > >> In the test I ware running, I had the same feeling. But, this will
> > >> change the expect behavior
> > >> of existing bundles and this is not what we like to see.
> > > Having had a second look at the sizes and taking into account the
> > > consideration about existing bundles I agree to leave as is.
> > >>>
> > >>> For data thinning the "Skip XY" still does not work. It issues "sample
> > >>> do not form a valid grid".
> > >>
> > >> The RUC grid file I was testing on, the "skip xy" was working ok,
> > >> maybe you can upload a sample
> > >> file of yours.
> > > Try the attached file.
> > >>>
> > >>> Thus, the only method to spatially thin the data set is thorugh the
> > >>> stride tab. However, when thinning this way IDV falls back to the giant
> > >>> vectors we have had before.
> > >>>
> > >>
> > >> I can not reproduce this. The stride and skip sent back the same result.
> > > I cannot reproduce my prior finding either. Even better.
> > >
> > > HP
> > >>
> > >>
> > >> Yuan
> > >>> All said I hope we are almost there, HP
> > >>>
> > >>> On 2011-02-03 04:03, Unidata IDV Support wrote:
> > >>>> Bonjour HansPeter,
> > >>>>
> > >>>> Please checkout the nightly build version of the IDV (the nightly
> > >>>> builds happen at ~8UTC). Let us know if the wind barbs behave as you
> > >>>> expect.
> > >>>>
> > >>>> Thanks for your input.
> > >>>>
> > >>>> -Julien
> > >>>>
> > >>>>>> Full Name: HansPeter Roesli
> > >>>>>> Email Address: address@hidden
> > >>>>>> Organization: EUMETSAT
> > >>>>>> Package Version: 2.9u4 build date:@DATE@
> > >>>>>> Operating System: Windows 7
> > >>>>>> Hardware: Java: home: C:\Program Files\IDV_2.9u4\jre version:
> > >>>>>> 1.6.0_20 j3d:1.5.2 fcs (build4)
> > >>>>>> Description of problem: Hi -
> > >>>>>>
> > >>>>>> Wind barbs do not scale correctly. They scale like flow vectors
> > >>>>>> and other point observations. The problem is that the zoom factor
> > >>>>>> is not taken into account when the barbs are first drawn.
> > >>>>>>
> > >>>>>> cheers, HP
> > >>>>>>
> > >>>>>>
> > >>>>>
> > >>>>> HP,
> > >>>>>
> > >>>>> Thanks for submitting this bug report, I will fix it after the AMS.
> > >>>>>
> > >>>>>
> > >>>>> Yuan
> > >>>>
> > >>>>
> > >>>> Ticket Details
> > >>>> ===================
> > >>>> Ticket ID: VTX-233380
> > >>>> Department: Support IDV
> > >>>> Priority: Normal
> > >>>> Status: Closed
> > >>>>
> > >>>
> > >>>
> > >>
> > >>
> > >> Ticket Details
> > >> ===================
> > >> Ticket ID: VTX-233380
> > >> Department: Support IDV
> > >> Priority: Normal
> > >> Status: Open
> > >>
> >
> > --
> > Don Murray
> > NOAA/ESRL/PSD and CIRES
> > 303-497-3596
> > http://www.esrl.noaa.gov/psd/people/don.murray/
> >
> >
> 


Ticket Details
===================
Ticket ID: VTX-233380
Department: Support IDV
Priority: Normal
Status: Closed


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