Don- What you are seeing is the fact that netcdf4 files have a larger fixed overhead than netcdf3 files. To see this, change that dimension to 333333, for example, and you should see that the netcdf3 file is now about the same size as the netcdf4 file, partly because of how unlimited is handled and partly because of fill value handling. =Dennis Heimbigner Unidata Ticket Details =================== Ticket ID: GPA-681302 Department: Support THREDDS Priority: Normal Status: Closed
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