Re: mask 2D lat/lon grid with 1D shapefile

Hi Leif,

I just had a similar problem recently. Example 11 deals with masking from
a shapefile
with 2d lat/lon coordinates.

http://ncl.ucar.edu/Applications/Scripts/shapefiles_11.ncl

I hope this helps,
Maria

> Hi all,
>
> I am looking to extract an area weighted average of gridded data using a
> shape file. I am following the basic procedure of the shapefiles_9.ncl
> example (http://www.ncl.ucar.edu/Applications/Scripts/shapefiles_9.ncl).
> Basically, it reads the 1D lat/lon ranges from the shapefile and uses
> these ranges to mask the original 1D gridded data.
>
> Like the example, I have a shapefile in a geographic projection with
> single
> dimension x and y values (in degrees). My problem is that my gridded data
> is in a rotated lat/lon grid (time,y,x). The longitude and latitude
> variables both have two dimensions (y, x). I can't seem to wrap my head
> around how to mask these data using a shapefile in a standard 1D grid.
> Any
> help would be gratefully received.
>
> Best,
> Leif
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Received on Mon Aug 26 20:37:27 2013