[QGIS-Developer] [Qgis-user] Handling a large number of raster layers with Qgis architectural limitations

[Patrick Dunford]

Building pyramids gobbles up heaps of disk space. I tried pyramids on 
157 MB layer, which created an extra file 1.6 GiB.

I can't see the WMTS building lots of temporary file pyramids using up disk

On 18/11/19 10:50 PM, Alexandre Neto wrote:
> Hi Patrick,
>
> Sorry for asking, did you create pyramids (overlays) for your raster 
> "tiles"?
>
> See more information about pyramids on QGIS official documentation:
>
> https://docs.qgis.org/3.4/en/docs/user_manual/working_with_raster/raster_properties.html#pyramids-properties
>
> To create pyramids on many files, it's probably better to use GDAL 
> directly to process all files in a folder:
>
> https://gdal.org/programs/gdaladdo.html
>
> My feeling is that the WMS service is doing that for you, and that's 
> the reason why it works well with a service.
>
> Alexandre Neto
> QGIS Support
> www.qcooperative.net <http://www.qcooperative.net>
>
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