[gdal-dev] GDAL GeoPackage raster support

[Even Rouault]

Le mercredi 17 décembre 2014 13:03:13, Pepijn Van Eeckhoudt a écrit :
> On 17/12/14 11:18, Even Rouault wrote:
> > In the update scenario like gdaladdo, an optimization that is used when
> > creating the file from scratch (gdal_translate) isn't applied. You can
> > try adding "--config OGR_SQLITE_SYNCHRONOUS OFF" on the gdaladdo command
> > line. I suspect this must be the issue. I was a bit hesitant to apply it
> > by default in update cases since it means that a interruption of the
> > process (ctrl-c) could damage the database. But this is generally the
> > case for other formats, so we probably could apply it too.
> 
> Not sure if this is feasible in GDAL, but what I did in my own code is
> to use transactions to speed things up. All the tile inserts are batched
> in transactions of 100 tiles or so.
> I had a look at the driver code, but it wasn't immediately clear to me
> if this is already happening or not. Doesn't look like it though.

No, it doesn't for now. Could indeed be a potential optimization.

> 
> Pepijn
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