Hi Tasnuva:

You don't specify the format of the file you want to interpolate. If this file is in the netCDF format, you can use the R function 'resample' of package 'raster' to interpolate. First transform your netCDF file to multi-band raster using function 'brick'.

Another way of doing spatial interpolation of netCDF files is by using function 'ncap2' of package NCO. Another package you can use is CDO, see functions 'remapbil' and remapbic' for biiinear and bicubic interpolation respectively.

Hope it helps,

Augusto 

Hello L. Augusto Sanabria,

My file was in GRIB format. I have converted this into .dat format as SDSM required .dat format data.

Thanks,

Tasnuva 

Hi Tasnuva,

There are two options you can try,

(1) Convert GRIB file to netCDF using CDO or NCL (NCAR Command Language); and follow the advice given by Augusto.

(2) Use built-in NCL ESMF regriding/interpolation functions. You can use NCL to read GRIB files and do regrinding. Please refer the following link.

http://www.ncl.ucar.edu/Applications/ESMF.shtml

Thank you so muchL. Augusto Sanabria and Sopan Kurkute. It was so helpful for me.