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20011028: gempak question
- Subject: 20011028: gempak question
- Date: Mon, 29 Oct 2001 10:31:03 -0700
Andrew,
Anytime you receive a message "NCLRAL, it means that GEMPAK is not able to
access
the colors it needs for the device driver.
First, run gpend and then check to make sure you don't have other
"xw" or "gf" processes hanging around eating up your colors. It could
be that you had other sessions that didn't get the GPEND when finished.
If you aren't running "ntl" and have more than 1 GUI or xw/gf driver open,
then you need to run ntl to set up the shared color map so that each GEMPAK
process
doesn't have to get its own colors.
If you have a web browser like "netscape" eating all the
colors, consider running it with the "-install" option.
You can plot a tropical storm and/or tropical cyclone symbol
in any program that supports STNPLT (like gpmap, or sfmap).
Create a station table entry for your locations and then use the
appropriate MARKER symbol (number 23 or 24).
You can also use the NMAP/NMAP2 product generation pallette to
interactively place the graphic symbol.
Steve Chiswell
Unidata User Support
>From: Andrew Levine <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200110290659.f9T6xP126087
>
>Hello,
>
>I am using the gempak gdplot program to plot potential vorticity
>fields which I have calculated. I am having a problem plotting out the
>results. I would like to plot the potential vorticity fields and wind
>barbs. When I use the program, I get the following error message:
>
> GEMPAK-GDPLOT>r
>Creating process: xw for queue 751
> [GEMPLT -46] NCLRAL - Can not allocate read/write colors.
>
>
>This is how I have set the parameters:
>
> GDFILE Grid file /home/ua/levine/gingerpvdat.gem
> GDATTIM Grid date/time 970922/1200
> GLEVEL Grid level 370
> GVCORD Grid vertical coordinate thta
> PANEL Panel loc/color/dash/width/regn 0
> SKIP Skip_cntr/skip_plt_x;skip_plt_y 0
> SCALE Scalar scale / vector scale
> GFUNC Scalar grid pvth
> CTYPE Contour type: C/F c/f
> CONTUR Subbox/smooth 0
> CINT Contour interval/min/max 0
> LINE Color/type/width/label/smth/fltr 3
> FINT Fill interval/min/max 0
> FLINE Fill colors 10-20
> HILO Color/symbol/rng/rad/cnt/intp
> HLSYM HILO txt size/posn/font/wdth/hw
> CLRBAR Color/ornt/anch/x;y/ln;wd/freq
> GVECT Vector grid WND
> WIND Wind symbol/siz/wdth/typ/hdsz am1
> REFVEC Mag;x;y;txtsiz/font/wdth/HW;labl 10.0
> TITLE Title color/line/title 4
> TEXT Size/fnt/wdth/brdr/N-rot/just/hw 1
> CLEAR Clear screen flag YES
> GAREA Graphics area -32.625; 119; 72; -160
> PROJ Map projection/angles/margins|dr ced
> MAP Map color/dash/width/filter flag 1
> LATLON Line color/dash/width/label/inc 4/1/2/2/5;5
> DEVICE Device|name|x size;y size|color xw
> STNPLT Txtc/txt attr|marker attr|stnfil
>
>This is a 370 K part of the gdinfo that shows up when I use gdinfo:
>
> NUM TIME1 TIME2 LEVL1 LEVL2 VCORD PARM
> 1 970922/1200 370 THTA UWND
> 2 970922/1200 370 THTA VWND
> 3 970922/1200 370 THTA PRES
> 4 970922/1200 370 THTA TMPK
> 5 970922/1200 370 THTA HGHT
> 6 970922/1200 370 THTA PVTH
> 7 970922/1200 370 THTA STAB
>
>
>Would you be able to tell me what I am doing wrong and how I could fix the
>problem?
>
>Also, I would like to put a marker where the center of the tropical
>cyclone is, is there a way to place a tropical cyclone symbol where the
>center is located, if so, could you tell me how to do it?
>
>I appreciate any help you can offer.
>
>Thanks,
>Andrew Levine
>
>
