[gradsusr] ctl file for irregular lon and lat dimension

wendi harjupa wendiharjupa at gmail.com
Thu Jun 20 03:43:40 EDT 2019

Dear GrADS users,

I need your help with this problem.
I have two-dimensional data, which have no linear resolution, such below;

1. The first, second, third and the last coordinate longitude data are
21.2887,  121.29860, 121.30840 and 148.76140, respectively.
2. The first, second, third and the last coordinate latitude data are
22.70906, 22.70909, 22.70911 and
46.19549, respectively.

I want to make the control file for the data to plot it by grads,

XDEF LEVEL 2800 121.28870  XXXX
YDEF LEVEL 2400 22.70906 YYYY

What number should I use to change XXXX and YYYY?
and is there special command should I use to handle the irregular spatial

Very appreciate for your help.
Thank you very much.
Best regards,

On Wed, Jun 19, 2019 at 9:17 PM wendi harjupa <wendiharjupa at gmail.com>

> Dear GrADS user,
> I want to plot the data which has irregular lon and lat...
> I donot want to interpolate the data, so I just want to plot it as the
> original data.
> My question is how to make the control file for the irregular lon and lat
> data.
> I attach two data through this email,
> 1. asci data which shows the different of lon and lat of the data.
> 2. Binary format data of the asci data.
> Thank you very much for your help.
> best regards
> wendi
>  RDCA20150803_0305.bin
> <https://drive.google.com/file/d/1HDCQXO30JwIRCaxTL-H1pf6eibRvhTpp/view?usp=drive_web>
>  RDCA20150803_0305.txt
> <https://drive.google.com/file/d/1l0vSZLO0Z21aBlfuMLF2UJM02m0kXTtC/view?usp=drive_web>
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