[ncl-talk] How to extract a grid value of TRMM according the certain latitude and longitude

[Mary Haley]

​Hi ​
Yi Lu,

We have a examples page on subsetting data based on lat/lon.  See:

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

I believe TRMM data is represented by two-dimensional lat/lon arrays, is
that correct? If so, then the "latlon_subset_2.ncl" example is the one you
want to look at. The function it uses is getind_latlon2d:

http://www.ncl.ucar.edu/Document/Functions/Contributed/getind_latlon2d.shtml

--Mary



On Tue, Mar 14, 2017 at 8:26 AM, 易路 <dg1225033 at smail.nju.edu.cn> wrote:

> Hi, all
>      I planned to extract some grid values of TRMM according to a series
> of specified point locations (defined by their latitudes and longitudes),
> but I don't know which function I could use, are there any functions in
> NCL like wrf_user_ll_to_ij() and wrf_user_ij_to_ll() to obtain the grid
> numbers of TRMM according to the latitude and longitude information?
>     Thanks very much for your attentions and precious time!
>
> Best wishes!
>
> Yi Lu
>
>
>
>
> 易路
>
> 南大邮件系统/学生/博士生/12级博士生
>
> 南京市汉口路22号
>
>
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