# [ncl-talk] Extracting data for a given point from a model output

Setareh Rahimi setareh.rahimi at gmail.com
Mon Dec 28 12:10:45 MST 2020

```Dear Dennis,
Many thanks for your response. What I exactly mean is how to extract for
example "Temperature variable" value for a specific lat/lon from the output
result. For example: what is temperature value for a point at (lat=32, lon
52)?
Thanks again
Best wishes

On Mon, Dec 28, 2020 at 10:17 PM Dennis Shea <shea at ucar.edu> wrote:

> *getind_latlon2d *
> <https://www.ncl.ucar.edu/Document/Functions/Contributed/getind_latlon2d.shtml>
>
> A modification of Example 1
>
>   lat2d = f->xlat
>   lon2d = f->xlon
>
>   *printVarSummary* <https://www.ncl.ucar.edu/Document/Functions/Built-in/printVarSummary.shtml>(lat2d)
>   *printMinMax* <https://www.ncl.ucar.edu/Document/Functions/Contributed/printMinMax.shtml>(lat2d, 0)
>   *printMinMax* <https://www.ncl.ucar.edu/Document/Functions/Contributed/printMinMax.shtml>(lon2d, 0)
>
>   lat   = (/  31.0 ,  17.31, 24.05   /)   ; user specified coordinate pairs
>   lon   = (/ -86.45,-101.00,-92.46   /)
>                                           ; return 2d subscripts
>   nm = *getind_latlon2d* (lat2d,lon2d, lat, lon)
>
>   *print* <https://www.ncl.ucar.edu/Document/Functions/Built-in/print.shtml>(nm)
>
>   X = f->mixrat              ; (time, kz, iy, jx)
>   Y = d->ddflx               ; (time, iy, jx)
>
>   nt =     .... the index some specified time
>
>   kl =     ... index
>
>  do k=0,*dimsizes* <https://www.ncl.ucar.edu/Document/Functions/Built-in/dimsizes.shtml>(lat)-1
>      n = nm(k,0)
>      m = nm(k,1)
>
>      x = X(nt,kl,n,m)
>      y = Y(nt,n,m)
>
>      *print* <https://www.ncl.ucar.edu/Document/Functions/Built-in/print.shtml>(lat2d(n,m)+"   "+lon2d(n,m)+"  "+x+"   "+y)
>   end do
>
>
>
>
> On Mon, Dec 28, 2020 at 10:16 AM Setareh Rahimi via ncl-talk <
> ncl-talk at mailman.ucar.edu> wrote:
>
>> Dear all,
>>
>> I need to extract data (it could be any variable like temperature, wind
>> ...) for a specific point (say synoptic stations) at a specific day and
>> time
>>  Yazd-2019_DUST01.2019010100.nc
>> ( Jan-03- 00:00 UTC), from a model output (file attached).  I wonder how
>> it could be achieved using NCL (any example...) .
>>
>> I appreciate any suggestion,
>> Best wishes,
>> --
>> S.Rahimi
>>
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>
>

--
S.Rahimi
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