[Wrf-users] Grid definition for WPS Intermediate File Format

[Bart Brashers]

I've written some Fortran code to convert yet another source of SST data (JPL's PODAAC) to WPS intermediate format. The SST data grid is in lat-lon, so my code needs to specify startloc, startlat, startlon, deltalat, deltalon, etc, as in the code block (see http://www2.mmm.ucar.edu/wrf/OnLineTutorial/Basics/IM_files/sample.f90)

  if (iproj .eq. 0) then
     write(12) hdate,xfcst,map_source,field,units,desc,xlvl,nx,ny,iproj
     write(12) startloc,startlat,startlon,deltalat,deltalon,earth_radius


I have set startloc = "SWCORNER".  Can someone please tell me if startlat,startlon are the CENTER of the (1,1) grid cell, or the lower-left CORNER of that grid cell?

That is, should I set (startlat,startlon) to (-90,-180) or to (-89.995,-179.995)?

Thanks,

Bart Brashers











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