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Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
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John, Russ, Mike, Etc This looks good - just like GRIB packing! Excellent if it makes HDF/NetCDF <-> GRIB conversions extremely 'thin'. Chris Chris Little IT Improvement Met Office FitzRoy Road Exeter Devon EX1 3PB United Kingdom Tel: +44 (0)1392 886278 Fax: +44 (0)1392 885681 Mobile: +44 (0)7753 880514 E-mail: chris.little@xxxxxxxxxxxxxxxx http://www.metoffice.gov.uk -----Original Message----- [mailto:owner-netcdf-hdf@xxxxxxxxxxxxxxxx] On Behalf Of John Caron Sent: 20 July 2004 16:31 try that last part again: To compute the scale and offset: add_offset = dataMin scale_factor = (2^nbits - 2) / (dataMax - dataMin) The precision of the data will be 1.0 / scale_factor. To move between packed and unpacked values: unpacked = (packed == 2^nbits-1) ? missing value : packed * scale_factor + add_offset
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