[Gdal-dev] A questions about IRasterIO and overlays

[gdal-dev-admin at remotesensing.org]

gdal-dev-admin at remotesensing.org wrote:
> Hmmm - remote subsetting is kinda what the OpenGIS web coverage server spec, http://www.opengis.org/docs/03-065r6.pdf, and the JPEG2000 JPIP protocol, http://www.kakadusoftware.com/jpip-links-and-info.html, are all about...
> 
> It would be awesome if someone were psyched to implement one of these items as a GDAL driver!

Chris,

It is my hope to at some point build WMS and WCS client support right
within GDAL at which point I will face similar issues to what James is
running into with OPeNDAP.  I would likely take the approach I outlined.

I would add that I made a first crack at being able to use JPIP in the
JP2KAK driver.  There, I used the same IO strategies used with local files
and I think this resulted in pretty terrible performance in some cases.
But I also found the whole JPIP access very flakey.  I presume this was
due to a poor implementation on my part, but I never had any client requesting
JPIP support, so I let it drop.

Best regards,

-- 
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