[gdal-dev] Motion: Approve RFC 24 - GDAL Progressive Data Support

Frank Warmerdam warmerdam at pobox.com
Tue Mar 16 16:54:21 EDT 2010

RICHARD Didier wrote:
> +1
> some questions for my understanding :
>   * does it only aim at raster datasets async read (no vector dataset
> support) ? whilst jpip at first is of great interest, it could be really
> interesting to be able to read WFS streams for instance.


The RFC does not attempt to address a similar capability in the OGR realm.

>   * no write support foreseen ? (well, not sure it is relevant ...)

I do not foresee write support.  While I can see value in asynchronous
writing, it does not that the concept of progressive update applies on
the write side.  I will note that writes are already cached rather than
being done synchronously, so we could do async writing right now without
changing the API if we just had a thread that flushed out writable blocks
without interfering with the main thread.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

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