Re: netcdf lookup tables

Hi Arthur:

You can store the lookup tables in netcdf-3, but theres no standard way for an
application to know to use the lookup values. netcdf-4 has enumerated types
which are really a lookup table.

The IOSP can do the lookups of course, so the expansion to floats only happens
if you actually write the original file out to a netcdf file. If thats what you
need to do, i should mention that we wont be able to write to netcdf-4 format
for now, and im not sure when we will be able to.

John

arthur.fotos wrote:
> John,
> We are currently developing IOSPs for several data formats that contain
> lookup tables for temperature, pressure, etc.  The raw data is stored in
> bytes.  The value of the byte is used to retrieve the value for
> temperature, pressure, etc from tables as a float.  Currently we perform
> the lookup and store the values as floats.  The end result is a netcdf
> file that is much larger than the original data file.  Using the netcdf
> 3 format, is there a way to provide the lookup tables and store the data
> as bytes?  If its not possible will it be possible in netcdf 4.
> thanks
> arthur fotos