20050106: [Fwd: Question about piping data to gpmap]

Dan,

Your plotting script calls /home/dan/test.csh which you haven't included,
but I'm assuming its purpose is tread the radar data from stardard input
of the script and write it out to the appropriate file. Otherwise, 
use EXEC instead of PIPE if the script isn't going to read the data
from the PIPE.

Since your process being invoked by the LDM probably isn't allowed to
display to your X server, your DISPLAY to localhost:0 won't accept the
gf driver connection unless your X server is logged in to, and have run
xhost to allow connections from all users on your system. 

Solutions here are to use the "gif" device which does not require an X server,
or createa virtual X server using Xvfb and use that as the display to draw to.

Steve Chiswell
Unidata User Support


>From: Daniel Leins <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200501060700.j0670Fv2013454

>To whom,
>
>I would like to pipe 0.5 reflectivity data to a script to generate gif 
>images for a webpage.  The script is identical enough to the script 
>provided on the unidata site as an example of how to generate gif images 
>for the web. I've gotten the script to work fine when I run it manually, 
>however when I try and use the PIPE option within my pqact.conf file, I 
>can't seem to get any images to generate upon receipt of the data.  Do I 
>have this section of the pqact file set up correctly?  `ldmadmin 
>pqactcheck` seems to think so.   I've also tried to set up a log for 
>this section, and it doesn't want to work either.   I've attached the 
>relevant portions of the pqact file, as well as the script for perusal.
>
>Note:  The tabs show up correctly within the file
>
>NEXRAD    ^SDUS[2357]. KEAX 
>([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(N0R)(...)
>   PIPE    -close    /home/dan/nexradgif.csh
>   -d    /home/dan/log.log
>
>I would like this program to run upon receipt of KEAX 0.5 reflectivity 
>data only.  The script is a csh script, located in /home/dan.  It's 
>chmod'd to 777
>
>This is the script (which works fine manually)
>
>#!/bin/csh -f
>setenv DISPLAY localhost:0
>source $NAWIPS/Gemenviron
>set MAPFIL = $GEMMAPS/hicnus.nws
>
>/home/dan/test.csh
>cd /data/ldm/NIDS/EAX/N0R
>set CURRENT_RAD=`ls * | tail -1`
>
># generate gifs in /tmp
>cd /tmp
>
>if(-e eax.gif ) then
>  rm -f eax.gif*
>endif
>
>foreach FILE ($CURRENT_RAD)
>
>gpmap << EOF
>mapfil = /usr/local/gempak/gempak/maps/hicnus.nws+hipowo.cia
>map= 2/1/1+5/1/2
>TITLE    = 1/-2/
>DEVICE   = gf|eax.gif.009|800;600
>SATFIL   =
>RADFIL   = /data/ldm/NIDS/EAX/N0R/$FILE
>PROJ     = rad
>GAREA    = 37.29;-96.53;41.15;-91.38
>CLEAR    = y
>PANEL    = 0
>TEXT     = 1.2/23/1/hw
>LATLON   = 0
>\$mapfil = hipowo.gsf
>r
>
>e
>EOF
>
>gpend
>
>mv /tmp/eax.gif.009 /var/www/html/wx/radar
>end
>
>
>Any insight would be greatly appreciated!
>
>Thank you,
>Dan Leins
>
>
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