TIFF images in GrADS

[Andrew Hazelden]

Hi Arlindo,

This is the technique I have worked out for high quality KML ouput. I  
export a dummy kml file + small tiff using gxout kml just for the  
Google Earth GroundOverlay <LatLonBox> coordinates. Then I use printim  
command to export a larger image in a format like TIFF or PNG.

Then I replace the reference in the KML file from the low resolution  
tiff to the new image on the line:
  <href>base_kml.tif</href>

Also in my experience Google Earth doesn't respect the transparency in  
GrADS TIFF or GIF exports but does in PNG exports.

You can change the image format of the high resolution output to  
either PNG, TIFF, etc.. by changing the file extension in the command:
printim full_rez.png x2048 y1024 -t 0

Attached are two Grads Scripts. The script kml_plot_with_countries.gs  
will plot political boundary outlines in the exported image. The  
script kml_plot_no_outlines.gs disables political boundary outlines  
with the grads command set mpdraw off.

Regards,
Andrew Hazelden
Weather Enthusiast


On Jan 6, 2010, at 9:02 AM, Arlindo Meque wrote:

>
>
> Dear  all,
>
> I’m trying to obtain a relief map in TIFF format from the GTOP  
> data.   I used the built-in command KML to produce the map:
>
> Set kml relief
> Set gxout kml
> d varname
>
>  But the size of the map is too small and the political boundaries  
> are not shown in the map.
>
> Is there a way to make bigger the map and to have the political  
> boundaries therein?
>
> Please find attached the output I am getting.
>
> Sincerely,
>
> Arlindo
>
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