[gradsusr] Plotting a NEXRAD netCDF file

[Sytske Kimball]

Jennifer,

Thanks for your response. Replies are added in below.


On Fri, Sep 20, 2013 at 3:03 PM, Jennifer Adams <jma at cola.iges.org> wrote:

>
> On Sep 20, 2013, at 3:47 PM, Andrew Friedman wrote:
>
> Hi Sytske,
>
> In your script you have 2 plot settings right after each other:
>
> 'set gxout grfill'
> 'set gxout shaded'
>
> I believe the second one overrides the first. Try commenting it out to see
> what the grfill plot looks like.
>
> That's right -- grfill will give a better view of actual grid box size.
> What does 'q ctlinfo' give you after you invoke sdfopen?
>

The plot with 'set gxout shaded' commented out, is attached - not very nice
looking.......
'q ctlinfo' came back with the following:

dset KMOB_V03_20091110_035730.nc
title Nexrad 2 radar dataset  03:57:30 UTC  11/10/2009
undef -999
dtype netcdf
xdef 800 linear -127.06 0.0776505
ydef 490 linear 20.4756 0.0776505
zdef 1 linear 0 1
tdef 1 linear 03:57Z10NOV2009 1mn
vars 1
Reflectivity=>reflectivity  0  t,y,x  Nexrad 2 radar dataset
endvars



>
>
> Also, you could try changing the shaded plot setting to the
> higher-resoluttion algorithm:
> 'set gxout shade2b'
>
> shade2b is not higher resolution -- it has more smaller polygons and takes
> longer to render. shade2 and shade2b should look exactly the same.
>

'set gxout shaded' and 'set gxout shade2' look the same.

Sytske



>
> --Jennifer
>
>
> Andrew
>
> On Sep 20, 2013, at 12:23 PM, Sytske Kimball <skimball at southalabama.edu>
> wrote:
>
> Dear GrADS users,
>
>
> I (finally) managed to plot a NEXRAD radar reflectivity fil, in netCDF
> format, using GrADS. The plot is attached (IdaRadar-test.png) as is the
> original radar image for the same area, displayed using GRLevelII
> (RadarLevel2.png). I can't figure out why the resolution on the GrADS image
> is so much worse than on the original image. The script is also attached.
>
>
> Any help would be much appreciated.
>
>
> Thank you in advance,
>
> Sytske
>
>
> Sytske (seets-kah) Kimball
>
> Professor of Meteorology
>
> Director, South Alabama Mesonet
>
> Dept. of Earth Sciences
>
> University of South Alabama
>
> Mobile, AL
>
> phone (251) 460-7031
>
> fax       (251) 460-7886
>
> email   skimball at southalabama.edu
>
> web:   http://chiliweb.southalabama.edu/
>
> <RadarLevel2.png><IdaRadar-test.png><StationPlot+radar2.gs
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>
> --
> Jennifer M. Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> 111 Research Hall, Mail Stop 2B3
> George Mason University
> 4400 University Drive
> Fairfax, VA 22030
>
>
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