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[IDV #WXG-265938]: IDV not displaying NOAA-CIRES 20CR fields properly

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  • Subject: [IDV #WXG-265938]: IDV not displaying NOAA-CIRES 20CR fields properly
  • Date: Thu, 21 Oct 2010 13:18:57 -0600
Hi Kevin,

Try the IDV's Plugin Manager (Tools->Plugin Manager menu) and install the
Bug Fixes->Spurious Map Lines Fix plugin. You will need to restart the IDV 
after installing the plugin for the fix to take effect.


-Julien

> Hi guys,
> 
> Just had a chance to look at this, as this problem also occurs with a
> global GRIB file (e.g. GFS) . . . if you set the projection such as
> Africa after initially loading it with auto-set projection.
> 
> Deselecting fast rendering helps, but does not eliminate all the spurious
> horizontal lines.
> 
> Spatial subsetting such as choosing every other point in x and y also
> helps, but does not eliminate the problem.
> 
> Let me know if you need any more details . . .
> 
> --kevin
> 
> ______________________________________________________________________
> Kevin Tyle, Systems Administrator               **********************
> Dept. of Atmospheric & Environmental Sciences   address@hidden
> University at Albany, ES-235                    518-442-4578 (voice)
> 1400 Washington Avenue                          518-442-5825 (fax)
> Albany, NY 12222                                **********************
> ______________________________________________________________________
> 
> On Thu, 12 Aug 2010, Unidata IDV Support wrote:
> 
> > Below, I meant *deselect* fast rendering. Sorry for the confusion.  -Julien
> >
> >> Hi, Kevin
> >>
> >> Yuan and I reproduced the horizontal line problem you see. We are pursuing 
> >> a bug fix, but in the meantime, we can offer a couple of workarounds:
> >>
> >> 1/ Select fast rendering (Dashboard / Display / Edit / Properties / 
> >> Settings)
> >> 2/ Spatially subset the data (Dashboard / Data sources / Properties / 
> >> Spatial Subset)
> >>
> >> Thanks,
> >>
> >> -Julien
> >>
> >> PS, I am new to Unidata, and the IDV team.
> >>
> >>> Hi Don,
> >>>
> >>> The units are correct now.
> >>>
> >>> Perhaps an unrelated bug, but I notice if I change projections (e.g., to
> >>> US), a number of horizontal lines appear on the plot.  I've attached an
> >>> exmaple . . .
> >>>
> >>> Thanks,
> >>>
> >>> Kevin
> >>>
> >>> On 07/26/2010 06:06 PM, Unidata netCDF Java Support wrote:
> >>>> Kevin-
> >>>>
> >>>> The IDV nightly build has this fix.  Please test it if you have a chance.
> >>>>
> >>>> Don Murray
> >>>>
> >>>>
> >>>>> Thanks, John!
> >>>>>
> >>>>> On 07/21/2010 06:49 PM, Unidata netCDF Java Support wrote:
> >>>>>
> >>>>>> This bug is fixed in current 4.2 code. We are trying to get a stable 
> >>>>>> version of it released. Will let you know when its ready. thanks for 
> >>>>>> your patience.
> >>>>>>
> >>>>>> John
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>> Hi all,
> >>>>>>>
> >>>>>>> When I load in NetCDF files from the 20th century reanalysis dataset
> >>>>>>> from the NCDC NOMADS TDS, I can read and plot data, but the data 
> >>>>>>> values
> >>>>>>> are not correct.   For example, 850 mb temperature grids found in the
> >>>>>>> air.YYYY.nc files will plot as if their temperatures fall between 430
> >>>>>>> and 430.7 K, with a default contour interval of .04 K.  Similar
> >>>>>>> unrealistic data ranges/contour levels will appear when other fields 
> >>>>>>> in
> >>>>>>> the 20CR data set are loaded.
> >>>>>>>
> >>>>>>> The netCDF files look fine, and they plot OK with other tools (I tried
> >>>>>>> ncview).  I suspect there is some issue with how IDV is interpreting 
> >>>>>>> the
> >>>>>>> netcdf file.  Note that the "add_offset" value (427.66) in the air.nc
> >>>>>>> files is suspiciously close to the 430K level that IDV is coming up 
> >>>>>>> with
> >>>>>>> . . .
> >>>>>>>
> >>>>>>> Any ideas?
> >>>>>>>
> >>>>>>> Thanks,
> >>>>>>>
> >>>>>>> --Kevin
> >>>>>>>
> >>>>>>> ______________________________________________________________________
> >>>>>>> Kevin Tyle, Systems Administrator               **********************
> >>>>>>> Dept. of Atmospheric&   Environmental Sciences   address@hidden
> >>>>>>> University at Albany, ES-235                    518-442-4578 (voice)
> >>>>>>> 1400 Washington Avenue                          518-442-5825 (fax)
> >>>>>>> Albany, NY 12222                                **********************
> >>>>>>> ______________________________________________________________________
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>> Ticket Details
> >>>>>> ===================
> >>>>>> Ticket ID: WXG-265938
> >>>>>> Department: Support netCDF Java
> >>>>>> Priority: High
> >>>>>> Status: Closed
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> Ticket Details
> >>>> ===================
> >>>> Ticket ID: WXG-265938
> >>>> Department: Support netCDF Java
> >>>> Priority: High
> >>>> Status: Open
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: WXG-265938
> > Department: Support IDV
> > Priority: Critical
> > Status: Open
> >
> 
> 


Ticket Details
===================
Ticket ID: WXG-265938
Department: Support IDV
Priority: Critical
Status: Closed