Re: 20040121: 20040121: changing background color in garp image products

Thanks Steve! -Neil

On Wed, 2004-01-21 at 18:00, Unidata Support wrote:
> >From: "Neil R. Smith" <address@hidden>
> >Organization: UCAR/Unidata
> >Keywords: 200401212255.i0LMtGp2023636
> 
> >On Wed, 2004-01-21 at 15:00, Unidata Support wrote:
> >> >From: "Neil R. Smith" <address@hidden>
> >> >Organization: UCAR/Unidata
> >> >Keywords: 200401211912.i0LJCDp2013860
> >> 
> >> >Is there a way to change th background color in garp
> >> >image products? I can't print these things with solid black
> >> >background all day without taking out a loan.
> >> >Thanks, -Neil
> >> >-- 
> >> >Neil R. Smith, Comp. Sys. Mngr.           address@hidden
> >> >Dept. Atmospheric Sci., Texas A&M Univ.   979/845-6272 FAX:979/862-4466
> >> >
> >> 
> >> Neil,
> >> 
> >> You could either:
> >> 
> >> 1) Print as postscript directly from nmap2 instead convering the gif from 
> >>    garp for your printer. The NMAP postscript output will invert the black
> >>    and white for just the reason you mention.
> >How do I convert the garp gif using nmap2? How do I get nmap2 to open
> >the the .gif file? I not be reading you right.
> 
> I was saying to create you display in nmap2, then click on "print".
> 
> >> 2) create a modified color table with the minimum data value set to white
> >>    instead of black.
> >Where are those color tables for garp located?
> 
> The gempak satellite and radar image enhancements are in $GEMTBL/luts.
> 
> >> 3) Use an external graphics program that can manipulate the gif color
> >>    index setting black to white.
> >like xview?
> 
> I don't have xview, but can do this with xv interactively, or
> on the command line with programs like gifsicle, such as:
> gifsicle --change-color "#ffffff" "#000000" \
>    --change-color "#000000" "#ffffff" \
>    gemtest.gif > gemnew.gif
> 
> 
> The above command would change black to white, and white to black from the
> input file gemtest.gif and create a new file called gemnew.gif.
> Really, this is the easiest way to take a bunch of files you already
> have and process the load really quick and painlessly.
> 
> Steve Chiswell
> 
> 
> 
> 
> >> 
> >> Steve Chiswell
> >> 
> >> --
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> >-- 
> >Neil R. Smith, Comp. Sys. Mngr.              address@hidden
> >Dept. Atmospheric Sci., Texas A&M Univ.      979/845-6272 FAX:979/862-4466
> >
> --
> NOTE: All email exchanges with Unidata User Support are recorded in the
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-- 
Neil R. Smith, Comp. Sys. Mngr.         address@hidden
Dept. Atmospheric Sci., Texas A&M Univ. 979/845-6272 FAX:979/862-4466