mergegrid variable scores
Added by Maria Volgler over 4 years ago
hi guys, i am fairly new to cdo and need some help ;)
i have a world_grid.nc and some regional_grid.nc they are all the same grid, variables etc.
now i try to megre them, so the worldgrid-pixels get the reginal-pixel-value when they overlap and the regional-pixel is not NAN.
i use: mergegrid world_grid.nc regional_grid.nc output.nc
this works and gives me a global raster, but the overlap pixels do not have the values of the regional-grid, but the difference between both grids.
how do i change that? i only want the original reginal values?!
thanks a lot!
Replies (1)
RE: mergegrid variable scores - Added by Karin Meier-Fleischer over 4 years ago
Hi Maria,
just to understand, you want to 'exchange' the values of world_grid.nc by regional_grid.nc, right?
Assuming that
- world_grid.nc has 180 x 90 (lon x lat)
- regional_grid.nc has 180 x 90 (lon x lat) and contains missing values
You can use the ifthenelse operator to exchange the values but you have to set the missing value of regional_grid.nc to 0. See https://code.mpimet.mpg.de/projects/cdo/embedded/index.html#x1-1870002.4.2.
cdo ifthenelse -setmisstoc,0 regional_grid.nc regional_grid.nc world_grid.nc outfile.nc
-Karin