Met3D supports various projection types that are available in the 'proj' library. If the user intends to explore these features , then the regular lat lon grid first needs to be regridded onto the appropriate projection and then visualized in Met3D.
This remapping can be done as outlined below, for example from regular lat lon to stereographic using CDO command
cdo -P 4 -O remapbil,${TARGETGRIDFILE} ${INFILE} ${OUTFILE}where -P 4 – Number of pthreads to speed up the processing (here 4).
remapbil – CDO operator to do remapping to a particular grid defined in the TARGETGRIDFILE.
TARGETGRIDFILE – A text file containing the target grid description , for example
gridtype = projection gridsize = 25600 xsize = 160 ysize = 160 xname = xc xlongname = "x coordinate of projection (eastings)" xunits = "km" yname = yc ylongname = "y coordinate of projection (northings)" yunits = "km" xfirst = -8000 xinc = 100 yfirst = 8000 yinc = -100 grid_mapping = Polar_Stereographic_Grid grid_mapping_name = polar_stereographic straight_vertical_longitude_from_pole = 0.f latitude_of_projection_origin = 90.f standard_parallel = 70.f false_easting = 0.f false_northing = 0.f semi_major_axis = 6378273.f semi_minor_axis = 6356890.f proj4_string = "+proj=stere +a=6378273 +b=6356889.44891 +lat_0=90 +lat_ts=70 +lon_0=0" # distances in km and grid res from here: https://nsidc.org/data/polar-stereo/ps_grids.html # other example grid, see: https://code.mpimet.mpg.de/projects/cdo/embedded/index.html#x1-130001.3