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Re: HDF metadata

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  • Subject: Re: HDF metadata
  • Date: Mon, 22 Nov 2010 16:17:46 -0700
On 11/22/2010 4:09 PM, Robert B. Schmunk wrote:

On Nov 22, 2010, at 17:53, John Caron wrote:


then, when you enhance it, it turns it into a double by applying the 
scale/offset, and the non-string attributes are:

I always use NetcdfDataset.acquireFile(String,CancelTask)
to open datasets. Poking through the API, it looks to me
like using this method always turns on enhancement.


NetcdfDataset.acquireDataset() uses enhanced mode by deafult, i dont think 
acquireFile() does though




it removes scale/offset attributes so they they dont get applied again. the 
missing values are converted to NaNs, and those are also removed since they 
dont make sense anymore now that the variables is a double.

Has this dropping of listed attributes from the reported
variable description always been the case, or something
that occurred when NJ went up to version 4?

It's not something I've ever noticed before, but now that
you explain it, it sounds like the same thing that was going
on when a fellow at GSFC wrote to me a month or so ago
about an HDF file in which some attributes were not
being reported.

rbs


yes, always




--
Robert B. Schmunk, address@hidden
NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025