Oliver Eichler wrote:
Hi,
Is there a way to get a progress when using RasterIO? Guess not ;) But it
would be quite nice to have. Usually RatserIO is really fast, so you don't
need it, but if you play with WMS access a feedback would be _really_ nice.
I know API changes suck. But is there any chance in future to pass a callback
function pointer and a void pointer to RasterIO. The callback function will
receive the progress and the void pointer. That should make C and C++ lads
happy. A way to abort transaction would be nice, too.
I would really like to press on this topic, because I thing RasterIO is pretty
neat and fast. I can get WMS access with just a few lines and it's quite the
same as handling a file. I really appreciate that, however without visual
feedback on the download progress the normal user will get frustrated. And
that would force me to re-implement all the magic.
How is the chance to get this into GDAL?
Oliver,
I'm generally not too keen on this due to the disruption and the complexity
of doing a decent job of progress reporting through the RasterIO process.
For the case of WMS it might make sense to just make modest sized requests
so the user sees progress after each chunk is completed.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmer...@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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