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Re: Hmmmm. Can rad handle the new 88d stuff yet? (decoder?)

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  • Subject: Re: Hmmmm. Can rad handle the new 88d stuff yet? (decoder?)
  • Date: Mon, 06 Nov 2000 17:16:37 -0600
In a previous message to me, you wrote: 

 >
 >Pete...
 >
 >You are trying to make things too complicated.  Most data compression programs
 >have some easy of way of sending uncompressed data to stdout.  The ones that
 >I know about are:
 >
 >      Scheme          Command to use
 >      pack            pcat
 >      compress        zcat
 >      gzip (ZLIB)     gzcat or zcat (depending on how it was built)
 >      bzip2           bzcat
 >
 >The only one that I can't find a way, (at least via the man pages that I have)
 >is "zip".
 >
 >As a sample:
 >
 >      cat file.gz | gzcat
 >
 >would get you the ungzipped version of "file".

Hi Kevin,

That's not exactly the problem here. The NEXRAD files are not
zip'd files, they just happen to use one of the same compression
algorithms that zip does.  They are not in 'zip' format, so
the stdio version (funzip on unix) doesn't recognize them.

 >
 >By the way, if you really want to program via ZLIB, just use "gzopen" and
 >"gzread".  It is easy to do using these calls.

That would work if the files were in gzip format, but they aren't,
zlib used to use gzip format but apparently it now uses the
deflate/inflate algorithms, so I don't think gzopen and
gzread will do it...

There are other routines in the zlib library to inflate
deflated data, it's just a matter of writing the program
to call them.

Am I way off base here?

Pete


 >
 >      Kevin W. Thomas
 >      Sun System Administrator & Meteorologist
 >      National Severe Storms Laboratory
 >      Norman, Oklahoma
 >
 >      Email:  address@hidden


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