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Hi,
so I've tried to use rect_to_curv function put a rectilinear data set on a curvilinear grid but with no success: let a = rect_to_curv(hi[l=1],tlon,tlat,2) yes? shade a, tlon, tlat Bailing out of external function "rect_to_curv": The range of source grid longitude may be no larger than tpi **ERROR: error in external function and so details of the dataset yes? sh dat currently SET data sets: 1> ./R1009RBRcevp01a.cice.h.hi.nc (default) name title I J K L M N TLON T grid center longitude 1:1280 1:720 ... ... ... ... TLAT T grid center latitude 1:1280 1:720 ... ... ... ... ULON U grid center longitude 1:1280 1:720 ... ... ... ... ULAT U grid center latitude 1:1280 1:720 ... ... ... ... TMASK ocean grid mask 1:1280 1:720 ... ... ... ... TAREA area of T grid cells 1:1280 1:720 ... ... ... ... ANGLE angle grid makes with latitude 1:1280 1:720 ... ... ... ... HI grid cell mean ice thickness 1:1280 1:720 ... 1:120 ... ... yes? sh grid hi GRID GEE2 name axis # pts start end NI X 1280 r 1 1280 NJ Y 720 r 1 720 normal Z TIME TIME 120 i 01-FEB-1980 00:00 01-JAN-1990 00:00 normal E normal F yes? sh grid tlon GRID GEE1 name axis # pts start end NI X 1280 r 1 1280 NJ Y 720 r 1 720 normal Z normal T normal E normal F thanks, Robert From: owner-ferret_users@xxxxxxxx [owner-ferret_users@xxxxxxxx] on behalf of Ansley C. Manke [ansley.b.manke@xxxxxxxx] Sent: Monday, March 21, 2016 5:03 PM
To: ferret_users@xxxxxxxx Subject: Re: [ferret_users] regriding Hi Robert,
You would need to use the regridding functions to regrid, say, one of the fields to a rectilinear grid and from there to the other curvilinear grid; or regrid both of them to the same rectilinear grid and do your calculations there. http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/CURV-TO-RECT http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/CURV-TO-RECT-MAP http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/RECT-TO-CURV We do have in the pipeline some development which will make handling curvilinear grids more seamless, and some regridding functions which are faster; but the fact remains that you'd need to get the data onto the same grids before being able to take differences. Ansley On 3/21/2016 3:53 PM, Osinski, Robert FORNATL, PL wrote:
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