Re: US mapping mask

Hi,

 Examples 4 & 5 from the shapefiles examples page shows how to use a shapefile as mask to get what you want:

    http://www.ncl.ucar.edu/Applications/shapefiles.shtml

In particular, check out the National Atlas for a national boundaries shapefile of the US:

    http://www.nationalatlas.gov/atlasftp.html

I think this one in particular *might* do the trick (but untested):

    http://www.nationalatlas.gov/atlasftp-1m.html#nationp

Hope that helps…
Rick

On Apr 3, 2013, at 10:14 AM, Wei Liu <wliu5ster@gmail.com> wrote:

> Hi there
>
> Could I ask question about the US masking? Say, I have global atmospheric ptrecipitaion.
> I want to calculate the mean precipitation over US. How can I get a US masking data file.
> Is there some US mask data available in NCL or other database?
>
>
> (I found in NCL, there is a Ncarg4_1 Earth 1 database, but how can I get the mask data
> or build a mask data?)
>
>
> Thanks a lot!
>
>
> Best
> W
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Received on Wed Apr 3 13:58:14 2013