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How to select the same area?

Added by Guilherme Martins over 6 years ago

Dear users,

I'd like to cut my precipitation file using the area of 221_067_NetCDF.nc file (this is a polygon).

221_067_NetCDF.nc = shapefile
prec.nc = my precipitation file

I tried:

cdo remapbil,221_067_NetCDF.nc prec.nc tmp.nc

But the result (result.png) is not equal to 221_067_NetCDF.nc file.

Any help is very appreciated.

Best regards,

Guilherme.

221_067_NetCDF.nc (62.4 KB) 221_067_NetCDF.nc Shapefile
prec.nc (59.5 KB) prec.nc Precipitation file
prec.png (10.2 KB) prec.png
shape.png (4.98 KB) shape.png
result.png (6.47 KB) result.png

Replies (4)

RE: How to select the same area? - Added by Karin Meier-Fleischer over 6 years ago

Hi Guilherme,

  cdo remapbil,221_067_NetCDF.nc prec.nc out_remap.nc

  cdo mul out_remap.nc 221_067_NetCDF.nc out_masked.nc

See attached PNG.

-Karin

plot_mask.png (38.2 KB) plot_mask.png Plot file from out_masked.nc

RE: How to select the same area? - Added by Guilherme Martins over 6 years ago

Dear Karin,

Thank you! :-)

Guilherme.

RE: How to select the same area? - Added by kunal bali over 6 years ago

Hello,

How can we create a shapefile in .nc file? Suppose if I want to create an Indian region shapefile then how is possible?

RE: How to select the same area? - Added by Karin Meier-Fleischer over 6 years ago

Hi Kunal,

first, CDO can't create a shapefile. You can download the shapefiles for India from http://www.gadm.org/. If you want to convert it to netCDF format use, as an NCL user, the ncl_convert2nc command line tool.

-Karin

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