[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20010515: 20010515: 20010515: gdradr script?

Mike,

Sorry for the confusion. I meant GRDAREA, though I said GAREA in the email.

Here is an example of a region.nts:
GRDAREA mi
PROJ    lcc
KXKY    720;500
GFUNC   n0r
GDFILE  YYYYMMDD_local.gem
RADTIM  current
RADDUR  30
RADFRQ  5
CPYFIL
STNFIL


Then, my invocation of gdradr:

gdradr << EOF
 restore region
 r

 e
EOF

If grdarea is a state or geographic abbreviation, then geog.tbl is used. If it
is a station id, then sfstns.tbl is used.


Steve Chiswell
Unidata User Support

>From: "Michael W Dross" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200105152052.f4FKpxp00855

>
>Steve,
>
>Thanks again for the info..
>
>I tried making a southeast sector, created a nexrad_se.tbl with just the
>sites in the southeast.
>
>To test I tried various attempts at using the garea example, and
>get errors. I also tried grdarea=clt for the heck of it. Was a little
>confused looking at:
>
>http://www.unidata.ucar.edu/projects/coohl/mhonarc/MailArchives/gempak/msg0282
> 9.html
>
>It seems that GAREA references the $GEMTBL/stns/geog.tbl file as opposed to
>the
>sfstns.tbl, maybe it does both. Either way it failed to lookup the ID.
>
>When I tried:
>$ cat gdradr_se.nts
>GAREA   gsp
>PROJ    lcc
>KXKY    720;500
>GFUNC   n0r
>GDFILE  /weather/gempak/composite/YYYYMMDD_radr_se.gem
>RADTIM  current
>RADDUR  15
>RADFRQ  5
>CPYFIL
>STNFIL  nexrad_se.tbl
>
>I get an error message:
>
> GRDAREA   Area covered by grid
> PROJ      Map projection/angles/margins|dr  lcc
> KXKY      Number of grid points in x;y      720;500
> GFUNC     Scalar grid                       n0r
> GDFILE    Grid file
>/weather/gempak/composite/YYYYMMDD_radr_se.gem
> RADTIM    Radar composite current/dattim    current
> RADDUR    Radar time window (minutes prior  15
> RADFRQ    Update Frequency                  5
> CPYFIL    Grid file whose navigation is to
> STNFIL    Station information file          nexrad_se.tbl
> Parameters requested: GRDAREA,PROJ,KXKY,GFUNC,GDFILE,RADTIM,RADDUR,RADFRQ,
> CPYFIL,STNFIL.
> GEMPAK-GDRADR> GEMPAK-GDRADR> [GDRADR 2]  NEXRIII template not found using
>$RAD/NIDS/%SITE%/%PROD%
> [GDCFIL -5]  Grid area ... is invalid.
> [GDRADR -4]  Failed to read grid projection ...
>
>
>The sfstns.tbl exist and looks ok..... I tried capitol letters too,
>ie GSP,CLT,NC,SC etc, with the same results.
>
>Mike
>
>>Mike,
>>
>>with 360,000 (720x500) points for the conus region shown below, you
>>have roughly a 6km resolution grid. This is like the National
>>composite I have on the gdradr page.
>>
>>Your gif is for a much smaller region - blown up, so it makes the
>>individual grid cells more blocky in contouring.
>>
>>For the floater region I have, I create a ~1km resolution grid.
>>For example:
>>garea = den
>>proj = lcc
>>kxky = 720;500
>>
>>(garea can be a city id from sfstns.tbl, or a state, or a lat/lon region)
>>
>>Also, I added a TYPE=z to gdplot2 which will just fill in the individual
>>grid cells, as opposed to TYPE=f for contour filling. That will speed
>>up the display since the contouring algorithm isn't used..
>>
>>Steve Chiswell
>>Unidata User Support
>