[gradsusr] Lat Long question

[Jennifer Adams]

On Oct 11, 2010, at 3:42 PM, Metris Limited Forecaster wrote:

> I have a Meteogram script which allows for a specified Latitude/  
> Longitude ... to be used
>   My question is with grads does it get the nearest grid data for  
> that point or does it interpolate
> the grid data for the specified point or does use the  nearest grid  
> point?
The meteogram script uses the nearest grid point to your specific lat  
lon.

>
> If it uses the nearest grid point ... what would we do the script to  
> get an interpolated result?
You would have to get values from the four surrounding gridpoints and  
bilinearly interpolate.

>
> The scripts pulls down the data is using DODS.
Please note that you may be using an old version of the meteogram  
script. Latest versions are in
ftp://iges.org/pub/jma/meteograms/
Please start with by reading the ReadMe file very carefully.
I cannot provide further support for using or modifying these scripts,  
but other users in this forum may have some experience or wisdom to  
share.

--Jennifer


>
> Your help would be appreciated
>
> Howard Staines
>
> Forecaster Metris Limited
> websited - www.metris.co.nz  - phone 06 8441042 - fax 06 8441046
>
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> gradsusr at gradsusr.org
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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