[ncl-talk] About SplineWarning

[Mary Haley]

A minor correction: it is not enough to simply zoom in on the data with the
mpMinMaxLat/LonF resources. Even when you zoom in on the map this way, NCL
will still try to contour whatever part of the data array you passed in.

Setting these four resources is still a good idea, because this way you
only see the region that you're interested in

The example you referred to shows how to subset the data for the lat/lon
region you're interseted in, but perhaps you need to subset it more.

One other issue might be that you need to set gsnAddCyclic to False:

  res at gsnAddCyclic = False

If you continue to have problems, then it would help if we could see your
script. It would also help to see the output from doing a "printVarSummary"
on your data.

Thanks.


--Mary




On Wed, Nov 9, 2016 at 10:21 PM, Dennis Shea <shea at ucar.edu> wrote:

> For historical reasons,the default for gsn_csm_contour_map function
> assumes the input array is global.  This means the longitudes are cyclic.
> Your data are regional. Try
>
>   res at gsnAddCyclic = False     ; default is True
>
>   res at mpMinLatF    =  22.5     ; min(lat)
>   res at mpMaxLatF    =  47.6     ; max(lat)
>   res at mpMinLonF    = 120.0     ; min(lat)
>   res at mpMaxLonF    = 149.875   ; max(lat)
>
> ===
> Please look at examples: http://www.ncl.ucar.edu/Applications/
> See Cylindrical equidistant
>
> On Wed, Nov 9, 2016 at 9:53 PM, Tao Lu <hakufu.asano at gmail.com> wrote:
>
>> Hello ncl-talk
>>
>> I am referring to the SplineWarning in ncl homepage: http://www.ncl.ucar.
>> edu/Document/Language/error_messages.shtml#SplineWarning
>> I copy the contents and run as an example and found this did not solve
>> the problem.
>>
>> Is there any new advice about this error?
>>
>> --------------------- first plot ------------------------------
>> -------------------------------------------------
>>
>> [image: Inline image 1]
>> --------------------second plot--------------------------
>> ---------------------------------------------------
>> [image: Inline image 2]
>>
>> --
>> ******************************************************
>> Tao Lu    (M. Eng)
>> Laboratory of River Engineering and Hydrology,
>> Dept. of Civil and Environmental Engineering,
>> Graduate School of Science and Engineering,
>> Chuo University
>>
>> 1-13-27,Kasuga,Bunkyo-ku,Tokyo
>> 112-8551, Japan
>> TEL: 03-3817-1805;   Phone: 070-2188-7509
>> Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
>> Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
>> ***************************************************
>>
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>
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