[gradsusr] Base map and Shaded plots

[Colleen Mikovitz]

One solution, although it may not be the best, would be to create some  
sort of land/ocean mask with your resolution of data, then use the  
maskout function to color the land areas.  In my example, I have a  
crude land mask with all ocean values as a negative number.  Then do  
something like:

ga-> set gxout grfill
ga-> set ccolor 15
ga-> d maskout(type.2,type.2)
Where type is my mask in my second opened file.
Then plot your field.

Attached is the result with my data

Colleen

On Mar 1, 2012, at 4:57 AM, Pascal.ACHIM at cea.fr wrote:

> Hello,
> I want to overlay a concentration map (for example) on a base map  
> (eg continents in gray). Is it possible to do this with Grads? I  
> tried with Basemap.gs, but it does not work, continents mask the  
> concentration map. Attached is an example of what I want to do (the  
> continents were colorized in gray after with Gimp).
>
> Thank you for your help!
>
> Pascal
> <FIGURE_03.png><ATT00001.txt>

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