Re: Ocean Mask

On Sun, 20 Apr 2008 Valkhorn_at_aol.com wrote:

> That worked, thanks. I'd hate to ask further, but is there a way to define
> the masked countries fill color, too?
>
> -William

You can use the resources mpFillAreaSpecifiers and
mpSpecifiedFillColors to indicate which specific areas you want
to assign a specific color to. For example:

   res_at_mpFillAreaSpecifiers = (/"Netherlands", "Brazil","Morocco","Australia"/)
   res_at_mpSpecifiedFillColors = (/"Orange", "yellow", "black", "green"/)

You need to know what strings are valid for a filled area, so see:

http://www.ncl.ucar.edu/Document/Graphics/Resources/mp.shtml#mpFillAreaSpecifiers

for more information.

--Mary

>
> In a message dated 4/20/2008 8:40:46 A.M. Central Daylight Time,
> haley_at_ucar.edu writes:
>
>
> William,
>
> There are a number of ways you can do this, depending on your data.
>
> Please see our "masking" applications examples at:
>
> http://www.ncl.ucar.edu/Applications/mask.shtml
>
> Here's a very simple example, that shows how to use a "DrawOrder"
> resource to control masking:
>
> ----------------------------------------------------------------------
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>
> begin
> ;
> ; Generate an ny x nx array of random data with a minimum of -10 and a
> ; maximum of 110.
> ;
> nx = 40
> ny = 40
> z = generate_2d_array(15,15,-10.,110.,0,(/ny,nx/))
> ;
> ; Generate 1D lat/lon coord arrays and attach to data. Make sure
> ; to include the units so we don't get warning messages from the
> ; gsn_csm_contour_map routine.
> ;
> lat = fspan(-90,90,ny)
> lon = fspan(-179,179,nx)
> z!0 = "lat"
> z!1 = "lon"
> z&lat = lat
> z&lon = lon
> z&lat_at_units = "degrees_north"
> z&lon_at_units = "degrees_east"
>
> ; Open workstation and define colormap.
> ;
> wks = gsn_open_wks("ncgm","mask")
> gsn_define_colormap(wks,"BlAqGrYeOrReVi200")
>
> ; Set some resources.
> ;
> res = True
> res_at_gsnMaximize = True
> res_at_gsnSpreadColors = True
>
> res_at_cnFillOn = True
> res_at_mpFillDrawOrder = "PostDraw"
> res_at_mpOceanFillColor = 27 ; this is a light blue
> res_at_mpLandFillColor = "Transparent"
>
> contour = gsn_csm_contour_map(wks,z,res)
> end
>
> ----------------------------------------------------------------------
>
> --Mary
>
> On Sat, 19 Apr 2008 Valkhorn_at_aol.com wrote:
>
>> Is there a way to set up NCL so that the ocean is filled with a color and
>> masks any contour lines that overlap it from land?
>>
>> Thanks!
>>
>> -William
>>
>>
>>
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>
>
>
>
>
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Received on Mon Apr 21 2008 - 08:20:55 MDT