# [ncl-talk] Cartesian coordinate plotting

Dennis Shea shea at ucar.edu
Tue Jul 23 21:25:28 MDT 2019

```[1]
I am not sure why you want to convert to a Cartesian coordinate system.
No extra information is provided and you lose geographic referencing.

[2] Not sure why you are using the following example as a basis:
*http://www.ncl.ucar.edu/Applications/regrid.shtml*
<http://www.ncl.ucar.edu/Applications/regrid.shtml>
regrid_15.ncl

[3] You can convert a region (say: 300km ) around a specified map location
[clat, clon] and directly convert to Cartesian. See attached.

On Fri, Jul 19, 2019 at 1:53 AM Md. Jalal Uddin via ncl-talk <
ncl-talk at ucar.edu> wrote:

> Hi all,
>
> I set a Cartesian coordinate (x,y) below.
>
>   pi       =   3.141593
>
>
>   r = ispan(0,300,10)
>   theta  = ispan(0,360,10)
>
>   x =
>   y =
>
>    ;printVarSummary(x)                ; [31] x [37]
>    ;printVarSummary(y)                ; [31] x [37]
>
>
> My precipitation data within 300 Km from the center lat and lon.
>  cen_avg  = dim_avg_n_Wrap(time_avg,0)    ;[radius | 31] x [circle | 180]
>
> How can I conform to cen_avg data as x, y and plot? Full code in the
> attached file?
>
> ;Jalal
>
> --
> *Md. Jalal Uddin*
> MSc in Applied Meteorology
> Nanjing University of Information, Science and Technology, China
> B.Sc. in Disaster Management (Hons.)
> Patuakhali Science and Technology University, Bangladesh.
> Cell: +8613260859092, +8801792052662
> Web: www.dmjalal90.weebly.com
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