Re: US mapping mask

Dear Rick

   Thanks you so much!

Best
W

On Wed, Apr 3, 2013 at 3:58 PM, Rick Brownrigg <brownrig@ucar.edu> wrote:

> 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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>

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Received on Wed Apr 3 21:05:26 2013