[gradsusr] Maskout sea from shapefile

[Stephen McMillan]

Your best bet is to use a shapefile for sea areas, if not already included
in your shapefile.  Have you looked at the .dbf to see if sea areas are
included?  If so, you can specify a range of element numbers (may have to
repeat 'draw shp...' command more than once if more than one set of element
ranges).
Stephen Mc

On Thu, Dec 3, 2015 at 10:17 PM, Rabah Hachelaf <r.hachelaf at gmail.com>
wrote:

>
> Hello all,
>
> I am trying to maskout sea area from shapefile, but the command i found
> masked out land area
>
> like :
>
> 'open gfs.ctl'
> 'set rgb 99 227 210 145'
> 'set lat 12 33'
> 'set lon 34.5 60'
> 'd tmp2m'
> 'set shpopts 99'
> 'draw shp world'
> 'printim tmp2m.png'
>
>
> I am wondring if there is a command line to inverse the process and
> maskout sea instead of land.
>
> Thank you
>
> Rabah
> --
>
>
>
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