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20000726: Gempak color question

>From: Michael Voss <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200007270006.e6R06CT15976

>Steve,
>
>Ok, thanks! That works I see. Now one more thing :). Is there a specific conti
> nuation character or means of continuing a Gempak command prompt line onto th
> e next line. I'm using FINT to specify a bunch of intervals (temps), but I ru
> n out of space on the cammand line. If I increase the window size it just tak
> es the values up to the 96th character and then cuts the rest off. Is there a
>  solution to my dilemma?
>
>thanks,
>
>Mike


Mike,

Sorry to say, that the line length is the limitation.
The only other way to deal with this is to run the program multiple times,
specifying different color ranges each time- overlaying the part that
you can't fit the first time. This is pretty easy if you are running in a script
so you only have to do that typing once. On the second time, you would use the 
first 
color as 0 to not fill over the areas you have already drawn.

We are working on adding fill ranges in the min/max portion of FINT for the 
next release
to accomodate this limitation.

Steve Chiswell
Unidata User Support

>
>At 04:27 PM 7/26/00 -0600, you wrote:
>>>From: Michael Voss <address@hidden>
>>>Organization: UCAR/Unidata
>>>Keywords: 200007261657.e6QGveT01373
>>
>>>(I'm sending this again in case the last one got lost during the power outag
> e)
>>>Steve,
>>>
>>>I've been creating gifs for classroom and web viewing using Gempak. I've bee
> n 
>>> playing with the coltbl files trying to make my own color ramps to suit our
>  n
>>> eeds. That part is going fine, my question has to do with 'absolute' color 
> sc
>>> ales. Using 850 temps as an example, I'm creating a color ramp for temp, co
> lt
>>> bl.temp, and I can access this fine with GDPLOT. However, my color scale al
> wa
>>> ys starts at the lowest temp found on the map, thus creating inconsistency 
> in
>>>  colors and temps between maps/times. I've searched the archives but I have
> n'
>>> t found anything directly addressing this issue. I've tried playing around 
> wi
>>> th setting the FINT min to various values and the beginning color = zero. I
>  c
>>> an get it to be consistent if I set the FINT min value to be somewhere abov
> e 
>>> the actual minimum, but then I get the problem of not being able to contour
>  t
>>> emps below the min, not a good solution. Is there a way to force the color 
> sc
>>> ale to begin at a certain value, thus providing consistency between maps? I
>  h
>>> ope this makes some sense :)
>>>
>>>Any ideas how I might address this problem?
>>>
>>>Thanks,
>>>
>>>MIke
>>>
>>>
>>>--------------------------
>>>Mike Voss                                
>>>Department of Meteorology            
>>>San Jose State University                        
>>>One Washington Square                           
>>>San Jose, CA 95192-0104   
>>>             
>>>408.924.5204 voice
>>>408.924.5191 fax   
>>>
>>
>>
>>Mike,
>>
>>Generally, you can specify specific specific contour values with FINT like:
>>FINT=.01;.1;.25;.5;.75;1;1.25;1.5;1.75;2;2.25;2.5;2.75;3;3.25;3.5;3.75;4
>>FLINE=0;21-30;14-20;5
>>
>>In that way, the contour values are always specified. Generally, this works w
> ell
>>for mag(obs) plots for instance where you always want 70knts to be the first
>>color value, and you know the specific value of your contours. Or in the
>>case of precip levels as shown above. In those cases, you generally have the 
> first 
>>fill color as zero- but for a temp map, that may not be the case- unless you 
> just want
>>to color the areas from -10 to 0F as potential icing regions for example. 
>>
>>If you don't really know the minimum value ahead of time, then its pretty tou
> gh
>>as you know. If you assume any temp colder than say -30F at 850 is your base 
> color,
>>(you don't need color=0 unless you want some area not to be colored), then
>>your first color is all temps colder than -30f. You can still draw contour li
> nes
>>in that region even if its all one color using ctype=c/f, so you can have a -
> 35
>>line contour within the area thats colder than -30F.
>>
>>Steve CHiswell
>>**************************************************************************** 
>>Unidata User Support                                    UCAR Unidata Program 
>>(303)497-8644                                                  P.O. Box 3000 
>>address@hidden                                   Boulder, CO 80307 
>>---------------------------------------------------------------------------- 
>>Unidata WWW Service                        http://www.unidata.ucar.edu/      
>>**************************************************************************** 
>>
>>
>--------------------------
>Mike Voss                                
>Department of Meteorology              
>San Jose State University                        
>One Washington Square                             
>San Jose, CA 95192-0104   
>             
>408.924.5204 voice
>408.924.5191 fax   
>