[Freegis-list] Rotated lat/long GRIB files

[Ari Jolma]

Kjell Røang wrote:

>Hi
>I came across some rotated latitude/longitude GRIB files (gridded data from
>meteorological simulations) and wonder if anyone knows how to transform
>between rotated lat/long to ordinary lat/long and back, preferable using an
>ellipsoidal coordinate system.
>  
>

I've used such data, but they were in NetCDF files and contained 
corresponding ordinary lat & long values for rotated lat values and one 
data set, thus I needed only to look up those and do no transformations.

Maybe those relations (rlon,rlat -> lat; rlon,rlat -> lon) are available 
in the same place where you got the data?

Regards,

Ari Jolma

>Regards
>Kjell Røang
>  
>
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-- 
Prof. Ari Jolma
Kartografia ja Geoinformatiikka / Cartography and Geoinformatics
Teknillinen Korkeakoulu / Helsinki University of Technology
POBox 1200, 02015 TKK, Finland
Email: ari.jolma at tkk.fi URL: http://www.tkk.fi/~jolma