[Qgis-developer] Removing old labelling / polygons (in 1.9)

Mayeul Kauffmann mayeul.kauffmann at free.fr
Thu Mar 8 17:22:22 EST 2012

I also experienced problems with new labelling for polygons.
Even when you set new labelling to try only one position, and stay on
centroid, labels still move when you pan. They kind of stay on the
centroid of the *visible* part of the area.
It is annoying when generating tiles with qgis server: you can get
duplicated or cut labels.
Users have difficulty with this and sometimes the only option is the old

(Cannot find back that wonderful post of a frequent qgis blogger who
faced the issue and went back to UMN Mapserver. SUre s/he is reading
Other example:

Blind guess: Maybe the fact that it recalculates centroid of partial
polygons at each refresh can cast some light on the performance issue?


Le mardi 06 mars 2012 à 14:00 +0100, Andreas Neumann a écrit :
> Hi,
>  Please be more concrete - there are almost 100 different settings and 
>  combinations. What is the problem very precise/concrete.
>  What settings did you use, what geometry type - maybe accompanied with 
>  screenshots of your settings.
>  In my experience the new labeling works very well and fast. Only area 
>  geometries are slow to label. Martin Dobias is currently working on 
>  improving/accelerating the labeling of area geometries.
>  Andreas
>  On Tue, 06 Mar 2012 13:13:11 +0100, Paolo Cavallini wrote:
> > Il 05/03/2012 17:06, Andreas Neumann ha scritto:
> >> Hi,
> >>
> >> We discussed this issue backwards and forwards and it would be good 
> >> to make some progress here. There is really not a lot missing in the 
> >> new labeling and I don't agree with Paolo that the new labeling is 
> >> slower than the old labeling. It may have different settings and thus 
> >> people are comparing apples with oranges.
> > Please test it with an old PC, ora netbooK: in our case it is almost
> > unusable with <300 polygons.
> > Also, some of the bugs are pretty serious.
> > All the best.

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