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Hi Angella, Thanks for sending the grib file. I see the problem. The data are "flipped" relative to the equator. Do you have any control over the creation of this grib file? I am still digging into the problem, but could it be possible that the latitude data are simply missing a negative sign? These are the latitude data that I am finding in that file: -2.0 -1.5 -1.0 -0.5 ....... 70.0 70.5 71.0 It seems like they should be going negative since the units for lat are "degrees north" -Julien > OK, this is the grib file. > > Angella > > > address@hidden> wrote: > > > Hi Angella. > > > > Would it be possible for you to send the grib file in question? > > > > Thanks. > > > > -Julien > > > > > > > > Ticket Details > > =================== > > Ticket ID: FDG-239851 > > Department: Support IDV > > Priority: Normal > > Status: Open > Ticket Details =================== Ticket ID: FDG-239851 Department: Support IDV Priority: Normal Status: Closed