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20010225: Specific Color Fills in Gempak 5.4

Mike,

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If you want to specify specific fill values, then list then in fint
as a semicolon separated list, like: fint=-20;-15;-10....etc.
If you have many levels, you may have to run the program more than
once for several ranges.

The maximum and minimun values in FINT only give the range in which
values will be considered, and not the specific contour values.
That is the problem you are having when your data does not 
cover the complete range of -60 to 140 that you are specifying.



>From: "Mike Hardiman" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200102251849.f1PInLL24802

>Hello!
>
>I've been attempting to create numerous contour plots which have color
>fills for various surface variables, but I've run into a problem in
>keeping the color fills consistent.  I've searched the help archives,
>and have found similar questions, with solutions that did not work for
>me.
>
>The input I'm using for gdcntr in the script being used to create the
>plot is:
>
>gdcntr << EOF
>
> GDFILE   = $GDFILE
> GDATTIM  = $DATE/$FILETIME
> GLEVEL   = 0
> GVCORD   = none
> PANEL    = 0/0
> SKIP     = 0
> SCALE    = 999
> GFUNC    = tmpf
> CTYPE    = F
> CONTUR   = 3
> CINT     = 5/-60/140
> LINE     = 1/-1/1/2
> HILO     =
> HLSYM    =
> CLRBAR   = STR/90.0;-95.0;0.0
> GVECT    =
> WIND     =
> REFVEC   =
> TITLE    = 1/-2/Current Temperature Analysis (F) ~
> TEXT     = 1/3//HW
> CLEAR    = NO
> GAREA    = 17;-116;52;-50
> PROJ     = STR/90.0;-95.0;0.0
> MAP      = 1
> \$MAPFIL = HIPOWO.CIA
> LATLON   = 0
> DEVICE   = GF|$SAVEDIR/tempusa.gif|866;687
> STNPLT   =
> SATFIL   =
> RADFIL   =
> LUTFIL   =
> CONTUR   = 3/3
> SKIP     = 0
> FINT     = 5/-60/140
> FLINE    = 2-29
>CTYPE    = c/f
>
>Where the colors in FLINE are defined later using gpcolor.  Despite
>setting my minimum value to -60, the lowest color (number 2) still gets
>assigned to the minimum value in the dataset or graphical area.  This is
>very annoying since the minimum value keeps changing, so that come
>summer time, my plot will be nothing but purple and blues!  I'm trying
>to keep things consistent by defining extreme minimum and maximum
>values, and choosing one particular color for each temperature interval.
>
>Any help would be greatly appreciated!
>
>Thanks.
>-Mike Hardiman
>


Steve Chiswell
Unidata User Support