Re: Grid transparency

Use -Q in grdimage.

I attached an example.

Regards


2014-02-26 19:23 GMT-03:00 Mr Abhash Kumar <[email protected]>:

>   Hi,
>
> I am using grdimage to plot two grid files (topography and slab grid
> file). The map (attached) shows ocean floor of the subducting plate in
> black color, which is perhaps due to the shallow depth values associated
> with those grid points. I used grdclip to change the "Z-vlaues" of each
> grid point shallower than 10km to NAN. I thought that NANs will be mapped
> transparent and bathymetry of the ocean floor will be visible but now the
> black portion turns into white and the ocean floor of the underlying layer
> is still not visible. I used the following commands:
>
>
>  system "grdimage -Y1.4i $grdfile $jflag $rflag $bflag -C$cptfn -Ishadow
> -V -K > $psfn\n"; (to plot the topography grid file)
> system "grdclip slabsurf1.grd -Gslabsurf_cliped.grd -Sb10/NaN -V\n";
> (processed slab grid file)
> system "grdgradient slabsurf_cliped.grd -A45 -Gshadow1 -Nt -V\n";
> system "grdimage slabsurf_cliped.grd $jflag $rflag $bflag -C$depcpt -O -V
> -K >> $psfn\n"; (to plot the slab grid file)
>
>
>  I would be extremely grateful to have any suggestions in this regard.
>
>
>  Thanks
>
> Abhash kumar
>
> University of North Carolina at Chapel Hill
>
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-- 
=============================
Juan González-Carrasco
Lic. en Oceanografía
Cel.: +569-85589754
e-mail: [email protected]
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