[ncl-talk] mask ocean areas: SOLVED
Sri Nandini
snandini at marum.de
Tue Mar 6 06:33:05 MST 2018
Thank you its solved!!!
I was using wrong plotting resource attributes.
On Mar 6, 2018 2:22:11 PM, Karin Meier-Fleischer wrote:
>
Hi Sri,
>
>
the landsea.nc mask file is OK. If your data is on a 1x1 deg grid
too than it should look like the attached plot. Maybe you have to
regrid your data to the same 1x1 deg grid.
>
>
If you want to generate mask files yourself for different grids you
can use the CDOs.
>
E.g. mask ocean 1x1 deg (r360x180):
>
> cdo -f nc -expr,'topo = ((topo >
0.0)) ? 1.0 : 0.0' -remapycon,r360x180 -topo
mask_the_ocean_1x1deg.nc
>
>
-Karin
>
> Am 06.03.18 um 13:21 schrieb Sri
Nandini:
>
> >
> >
Hello
> >
> >
Here i attach a plot using the same method as in mask_5.ncl
example==>HOWEVER, the landsea.nc mask is quite coarse and
covers large grid points.
> >
Is there a landsea mask available for 1x1 resolution?
> >
> >
> >
> >
> >
> >
> >
On Mar 5, 2018 11:06:13 PM, Dennis Shea wrote:
> > >
> > >
> > >
> > >
> > > 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> > > >
> > > > > > > >
> > > >
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