19991006: Using topographic AREA files in GEMPAK/GARP

Justin,

Once you have the AREA file created, it is fairly easy to add it
to the Garp display.

1) Add the AREA file into the $GARPHOME/map/areas directory

2) Edit the $GARPHOME/config/Garp_defaults file and add your AREA file 
   name to the colormapkeys list and your desired menu button string
   to match in colormaplabels.

   
The last thing will be to define an enhancement table that you 
want to use with the data. The continental area images from
McIDAS that I provided have a sensor source = 11, and band = 1.
So I defined in $GEMTBL/sat/imgtyp.tbl "TOPO" with:

IR            0    255     11      1      1 upc_topo.tbl

This defines the data range from 0 to 255 for sensor 11, band 1
with raw values to use the upc_topo.tbl which is found in
$GEMTBL/luts directory. Or, you can use the default linear gray.

You can also add your enhancement to the Garp enhancements menu
by adding the $GEMTBL/luts file name to the
$GARPHOME/tables/sat_enhance.tbl list (you can omit the .tbl
file name extension from this list).

Steve Chiswell
Unidata User Support





   
On Wed, 6 Oct 1999, Unidata Support wrote:

> 
> ------- Forwarded Message
> 
> >cc: David Ovens <address@hidden>
> >From: Justin Sharp <address@hidden>
> >Subject: Converting raster data to area data
> >Organization: University of Washington/Atmospheric Sciences
> >Keywords: 199910051925.NAA04765 GEMPAK topographic images
> 
> Hi,
> 
>  .... Responses to other questions provided by Tom Y.
> 
> 4) Finally, the reason I am doing all this is to provide myself and my
> department with high resolution terrain overlays for use in Gempak and
> Garp.  Once I have an area file how can I integrate it into Garp so that
> it can be selected of the overlays menu?
> 
> Sorry to ask such a lot of question at once but I've been struggling with
> this for a while.  Assuming that I can resolve these problems I will have
> the capability of producing 30 second terrain overlays for any specified
> area from 6N:-180W to 90N:-50W (i.e. all of N. America and beyond).  I
> will of course be happy to contribute these to the Unidata community at
> large.
> 
> Thanks,
> 
> Justin Sharp.
> 
> Justin Sharp          INTERNET: address@hidden
> UUCP:   uw-beaver!atmos.washington.edu!justin
> Dept of Atmospheric Sciences
> University of Washington, Box 351640
> 
> 
> ------- End of Forwarded Message
> 
>