[QGIS-Developer] Project migration 2.18 > 3.0 - QGIS Server GetMap output very big images compared to a "from scratch" project

kimaidou kimaidou at gmail.com
Thu Jan 11 03:17:50 PST 2018


Hi,

I have seen a difference :
* in the migrated file, the property <WMSImageQuality
type="int">90</WMSImageQuality> is kept inside the QGS.
* in a QGIS 3 project from scratch, this flag is not written if the default
value is used : menu Project / QGIS Server / WMS Capabilities / Qualite for
JPEG images. The flag is written only if the value is not the default one,
for example if value = 80

This means there is a regression in QGIS 3 Server, which uses this
parameter for PNG and not only for JPEG !

I will search deeper in the code

regards
Michaël






2018-01-11 12:08 GMT+01:00 kimaidou <kimaidou at gmail.com>:

> Hi,
>
> I am testing QGIS 3 Server.
> When I create a project from scratch in QGIS 3, and use it to publish WMS
> service, the getMap requests return correct PNG images :
> ~ 100 ko for a size of ~ 1500 X 800 pixels
>
> When I open a project made with 2.18 and save it with QGIS 3, and publish
> it, I get huge PNG files :
> ~ 4,5 Mo (!) for the same layer, configuration and getMap request.
>
> I am wondering what is happening. Here are the files and projects :
> https://framadrop.org/r/JpTgir91jk#ZHFXi6ejrGQ/
> 1NA2TbV4rD/HEfeqqbzA5XaVjrK+aqQ=
>
> I have not been able to see any major difference explaining this
> behaviour.
>
> Thanks in advance
>
> Michaël
>
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