Re: interpolation error of station into gridded data

Jin-Young,

The idsfft function is not one of our better interpolation routines,
as our documentation states.

You might try some other functions, like natgrid:

   http://www.ncl.ucar.edu/Document/Functions/Built-in/natgrid.shtml

or triple2grid, which doesn't do interpolation:

   http://www.ncl.ucar.edu/Document/Functions/Built-in/triple2grid.shtml

The documentation for these routines point to some other routines
that might be of use.

--Mary

On Wed, 31 Dec 2008, Jin-Young Kim wrote:

> I've tried after exchanging x-coordinate and ycoordinate.
> But results is same..
>
> Do you know other problem?
>
> Best regards,
> Jin-Young Kim
>
> On Wed, Dec 31, 2008 at 11:19 AM, Adam Phillips <asphilli_at_cgd.ucar.edu>wrote:
>
>> Hi Jin-Young,
>> I think you have the lat/lon inputs switched. According to the
>> documentation the first input should contain the x-coordinates (longitude),
>> and the second input should contain the y-coordinates (latitude).
>> Adam
>>
>> Jin-Young Kim wrote:
>>
>>> I'm trying to interpolate random data into gridded data.
>>> But it's so big differences between input and output value.
>>>
>>> --> before interpolation
>>> (0) min_val of in_rain= 0
>>> (0) max_val of in_rain= 80.33
>>> --> after interpolation
>>> (0) min_val of out_rain= -931.531
>>> (0) max_val of out_rain= 1026.31
>>>
>>> Here is ncl scripts and output log
>>>
>>> Does anybody know the reason?
>>>
>>> Best regards,
>>> Jin-Young Kim
>>>
>>> --
>>> Ph. D. Student
>>> Jin-Young Kim (jin_at_climate.pknu.ac.kr <mailto:jin_at_climate.pknu.ac.kr>)
>>> Integrated Climate System Modeling Lab.
>>> Department of Environmental Atmospheric Sciences
>>> Pukyong National University, Busan 608-737, South Korea
>>> Web : http:climate.pknu.ac.kr/~jin <http://climate.pknu.ac.kr/%7Ejin> <
>>> http://climate.pknu.ac.kr/~jin <http://climate.pknu.ac.kr/%7Ejin>>
>>>
>>> Visiting Scholar
>>> Jin-Young Kim (Jin-Young.Kim_at_noaa.gov <mailto:Jin-Young.Kim_at_noaa.gov>)
>>> Global Systems Division
>>> Earth System Research Laboratory
>>> R/GSD7
>>> 325 Broadway
>>> Boulder, CO80305-3328
>>>
>>> +1-303- 497-4422 (Office)
>>> +1-303- 497-7262 (FAX)
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
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>>
>> --
>> --------------------------------------------------------------
>> Adam Phillips asphilli_at_ucar.edu
>> National Center for Atmospheric Research tel: (303) 497-1726
>> ESSL/CGD/CAS fax: (303) 497-1333
>> P.O. Box 3000
>> Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
>>
>
>
>
> --
> Ph. D. Student
> Jin-Young Kim (jin_at_climate.pknu.ac.kr)
> Integrated Climate System Modeling Lab.
> Department of Environmental Atmospheric Sciences
> Pukyong National University, Busan 608-737, South Korea
> Web : http:climate.pknu.ac.kr/~jin
>
> Visiting Scholar
> Jin-Young Kim (Jin-Young.Kim_at_noaa.gov)
> Global Systems Division
> Earth System Research Laboratory
> R/GSD7
> 325 Broadway
> Boulder, CO80305-3328
>
> +1-303- 497-4422 (Office)
> +1-303- 497-7262 (FAX)
>
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Received on Wed Dec 31 2008 - 11:30:01 MST