20011028: gempak question

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 
>
>