[ncl-talk] mask ocean areas

[Dennis Shea]

Further ....

NCL is distributed with a simple 1x1 global mask. This may be adequate for
your needs.

https://www.ncl.ucar.edu/Applications/mask.shtml
Example 5

----

https://www.ncl.ucar.edu/Document/Functions/Shea_util/landsea_mask.shtml

The function indicates that multiple libraries must be loaded.
However, if you have 6.2.0 onward these libraries are automatically loaded.

---
Good luck

On Mon, Mar 5, 2018 at 1:58 PM, Adam Phillips <asphilli at ucar.edu> wrote:

> Hi Sri,
> To add to Mary's reply you can also tell NCL to color fill the ocean
> basins last, thereby applying a graphical mask.
> Example:
> res at mpFillOn = True
> res at mpFillColors = (/-1,0,-1,-1/)   ; set ocean to white, see:
> http://www.ncl.ucar.edu/Document/Graphics/Resources/mp.shtml#mpFillColors
> res at mpFillDrawOrder = "PostDraw"   ; do the map fill
> res at mpPerimDrawOrder = "PostDraw"   ; and perimeter draw last
> res at mpOutlineDrawOrder = "Draw"        ; draw the map outlines second
> res at cnFillDrawOrder = "PreDraw"          ; draw the color-filled contours
> first
>
> Adam
>
> On Mon, Mar 5, 2018 at 1:06 PM, Mary Haley <haley at ucar.edu> wrote:
>
>> Hi,
>>
>> Please see our masking examples at:
>>
>> http://www.ncl.ucar.edu/Applications/mask.shtml
>>
>> In particular, you may want to look at example mask_5.ncl which uses the
>> landsea_mask function, or example mask_12.ncl which uses a shapefile to do
>> the masking.
>>
>> --Mary
>>
>>
>> On Mon, Mar 5, 2018 at 9:50 AM, Sri Nandini <snandini at marum.de> wrote:
>>
>>> Hello
>>>
>>> I am trying to mask out ocean areas in my plot.
>>> Could someone please help me out with this? Is there mask data i can
>>> download from NCL?
>>>
>>>
>>>
>>>
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>
>
> --
> Adam Phillips
> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
> www.cgd.ucar.edu/staff/asphilli/   303-497-1726 <(303)%20497-1726>
>
> <http://www.cgd.ucar.edu/staff/asphilli>
>
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