Re: overlay map as a mask

all i need to do is mask out the *land* actually, but the below should send
me in the right direction.
thanks for your help! this is a great forum that you guys have going here.

BC

On Tue, Jun 26, 2012 at 3:45 PM, Adam Phillips <asphilli@ucar.edu> wrote:

> Hi Brandon,
> If all you want to do is tell NCL to mask out the ocean, one trick that
> can be used is to have NCL fill the oceans as the last step.
> Try setting these resources:
>
> res@mpFillOn = True
> res@mpFillColors = (/-1,0,-1,-1/) ; assuming 0 = white
> res@mpFillDrawOrder = "PostDraw"
>
> Setting mpFillDrawOrder ="Draw" might also work, depending on what else
> you are drawing. Let ncl-talk know if this doesn't work or is not what you
> are after... Adam
>
>
> On 06/26/2012 08:28 AM, Brandon Capasso wrote:
>
> Greetings,
>
> Im looking for a way to overlay a land map projection on top of a sea
> contour plot, as to "cover up" any contoured data values that lie outside
> the land sea mask of the map file (the data file is very hi-res and has
> water points in wet-lands that the map projection will cover up, which is
> what i want). I am hoping to use this to cleanup/hide blotches and streaks
> of color outside the desired plot region.
>
> Simply masking out the sea points in the file will not do here, because
> of the high concentration of wetlands and very shallow water "sea" points
> in the dataset.
>
> I actually achieved what I am trying to accomplish using imagemagick,
> but this requires me to create/save a template mask for every possible grid
> zoom, and it would be much simpler to do it with ncl.
>
> Regards,
>
> Brandon
>
>
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> --
> ______________________________________________________________
> Adam Phillips asphilli@ucar.edu
> NCAR/Climate and Global Dynamics Division (303) 497-1726
> P.O. Box 3000
> Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
>
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>
>
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Received on Wed Jun 27 06:15:49 2012