cdo interpolating to an irregular set of point

Added by Dan Rowlands almost 15 years ago

Hi,

I have a gridded dataset in a netcdf file and I'd like to perform bilinear interpolation to a set of irregularly spaced points.

cdo intgridbil,lon=<lon>_lat=<lat> in.nc out.nc

works for one point, but is there a generalization of this to multiple points, or do you need to call this command multiple times
from a script?

Thanks
Dan

Replies (3)

RE: cdo interpolating to an irregular set of point - Added by Uwe Schulzweida almost 15 years ago

Bilinear interpolation is not implemented for irregular grids but you can use nearest neighbor interpolation instead (function remapdis or remapnn):

cdo remapdis,mygrid ifile ofile

mygrid is an ASCII file with the description of the target grid. Here is an example for an irregular grid with 3 points:

gridtype  = cell
gridsize  = 3
xvals     = 30 50 52
yvals     = 10 11 12

Regards,
Uwe

RE: cdo interpolating to an irregular set of point - Added by Matti Kämäräinen over 8 years ago

This example has been working lately with my CDO 1.6.4, but not anymore...

I just keep getting an error message:

"cdo remapdis (Abort): unstructured grid without latitude coordinates!"

Can anyone guess why?

Thanks,
Matti

RE: cdo interpolating to an irregular set of point - Added by Matti Kämäräinen over 8 years ago

Never mind, I still had CDO 1.6.3. available and it works which is enough for me at this point... Apparently the other version is somehow broken.

(1-3/3)

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