Hi Hugo,
let me explain: I use mapcache to preproduce tiles of my background
layers rendered by QGIS server. Thus sometimes labels get cut because
they are rendered too close to the edge of the requested map.
I was attracted by Régis "Label features of layers only for objects
intersecting the mask region" and was thinking if one could use that to
address my problem, especially if it goes into core (needs to be for
server I reckon). There won't be a dedicated mask layer, of course, but
I imagined server creating the mask feature otf from the bbox parameter
of the GetMap request (minus a distance set in OWS server tab).
If you integrate this into core and there might be a chance to use it as
I described I would be happy if you integrated it in a way that would
allow to enhance QGIS server to use it.
Bernhard
Am 17.06.2014 10:22, schrieb Hugo Mercier:
Hi,
Le 17/06/2014 09:32, Régis Haubourg a écrit :
Hi Bernard,
plugin is coming this week I think.
Yes, it is already available at https://github.com/Oslandia/mask_plugin
A 1.0 version for the official qgis repository is on its way.
Bernhard Ströbl wrote
Thinking about QGIS server: Would there be a chance to use what you
describe to keep labels staying away from the edge of the requested map?
Bernhard
current implementation adds a In_mask(srid) expression, that can be used
anywhere in style or labeling settings. If QGIs server fill current mask
geometry with a bbox, slightly smaller than true extent, you will avoid
drawing labels to close from the edges. I'm not sure this is the best design
option, it sounds more like a hack to me.
I will let Hugo explain detailed implementation.
Well, I don't know exactly what is the problem with the labeling part of
the server. This label filtering feature has not been designed for such
a use-case. The current implementation of "atlas with mask" relies on
signals that are catched within a plugin to update the mask layer.
We could imagine something similar for the server, but I agree that
would be a hack.
The problem you have might be somehow related to how qgis clips vectors
before rendering them, as Nyall pointed out
(http://hub.qgis.org/issues/9757)
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