[ncl-talk] contour not working with missing values in coordinate variables

[Barry Lynn]

Hi:

If the nc data appears to be upside down, when you plot it, you probably
need to subtract 90 degrees from your data.

Also, you should printMinMax(data, False) to see the bounds of the data you
are trying to plot. If the longitude is not -180 to 180, this could also
mess up your program.

Barry



On Mon, Dec 21, 2020 at 8:38 PM xiaoming Hu <yuanfangcan at hotmail.com> wrote:

> Thanks!
> Not quite.
> What I currently plot is
> But I would like to plot the full data (from ncveiw):
> ncview figure appears to be up-side-down.
> Thanks
> Xiaoming
> ------------------------------
> *From:* Barry Lynn <barry.h.lynn at gmail.com>
> *Sent:* Monday, December 21, 2020 12:27 PM
> *To:* xiaoming Hu <yuanfangcan at hotmail.com>
> *Cc:* ncl-talk <ncl-talk at ucar.edu>; Xiaoming Hu <xhu at ou.edu>
> *Subject:* Re: [ncl-talk] contour not working with missing values in
> coordinate variables
>
> Hello:
>
> You can always plot point data, interpolating it to a grid.
>
> Perhaps this will help...?
>
> https://www.ncl.ucar.edu/Document/Functions/Built-in/linint2_points.shtml
>
> On Mon, Dec 21, 2020 at 7:44 PM xiaoming Hu via ncl-talk <
> ncl-talk at mailman.ucar.edu> wrote:
>
> Because there are missing values in the 2d latitude and longitude,  the
> contour plot did not work.
> So I have to cut off the area with the missing coordinate variables by
>   LST = f->visible_count(78:730,365:998)
>   LST at lat2d = latitude(78:730,365:998)
>   LST at lon2d = longitude(78:730,365:998)
>
> But by doing so, I miss a lot of useful data.
> Anyway to plot the full data?   My full script is attached
> A sample data file:
> http://www.caps.ou.edu/micronet/SouthernOcean/Observation/satellite.SATCORPS_V2.2_HIMAWARI-8.2km.201802170000.NC
> The domain I want to plot on:
> http://www.caps.ou.edu/micronet/SouthernOcean/Observation/wrfout_d01_2018-02-18_20:00:00
> BTW: this script works very slow even when I cut off the area with missing
> coordinate.
> Thanks a lot!
> Xiaoming Hu
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>
> --
> Guest Editor of Special Issue “Extreme Hydroclimatic Events and Prediction”
> LINK:
>
> https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events
>
> Barry H. Lynn, Ph.D
> Senior Associate Scientist, Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
> Weather and Climate Focus
> http://weather-it-is.com
> Jerusalem, Israel
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>

-- 
Guest Editor of Special Issue “Extreme Hydroclimatic Events and Prediction”
LINK:
https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events

Barry H. Lynn, Ph.D
Senior Associate Scientist, Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
http://weather-it-is.com
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
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