[ncl-talk] Land Mask

[Dennis Shea]

Maybe the following will help?

I have placed several land-sea masks with different resolutions at:

ftp ftp.cgd.ucar.edu
anonymous
email
cd pub/shea/MASH
prompt
ls
mget *
quit

/ftp/pub/shea/MASK

-rw-r--r--        40074 Dec 18 09:35 CERES.HiResLandSeaMask.nc.gz
-rw-r--r--      300535 Dec 18 09:39 land_ocean_lake_river_mask_pfv52.nc.gz
-rw-r--r--          4558 Dec 18 09:31 lsmask.1x1_noaa_oi.nc.gz
-rw-r-----  16201826 Dec 18 09:31 lsmask-world8-var.dist5.5.nc.gz

On Sat, Dec 17, 2016 at 1:07 PM, Jake Huff <jake.huff at stonybrook.edu> wrote:

> Hello,
>
> I am currently trying to create a high resolution land mask to include the
> smaller islands in the Caribbean. I am using the mask_5.ncl example script
> under the masking section. In the documentation, it discusses the 1 degree
> by 1 degree basemap found here:  *$NCARG_ROOT/lib/ncarg/data/cdf/landsea.nc
> <http://landsea.nc>*
>
> I am attaching the script that I am currently using to create a 0.1x0.1
> degree grid. It runs correctly, but I end up with the same land mask if I
> plot the landmask from the basemap above. My new landmask is at the higher
> resolution but smaller islands are not included. I think I need to increase
> the resolution of the basemap as opposed to just increasing the resolution
> of the landmask. I was wondering how I would go about creating a 0.1x0.1
> degree basemap. I need the high resolution to determine if tropical
> cyclones make landfall on the islands in the Caribbean, so I need to have
> the islands show up as land and not ocean.
>
> Thanks for any help,
>
> Jake
>
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