[Qgis-developer] Transparency: group versus layer
a.neumann at carto.net
Wed Aug 26 11:05:51 EDT 2009
On Wed, August 26, 2009 3:30 pm, Marco Hugentobler wrote:
> Hi Andreas
> Yes, please fill a feature request.
> Additionally, there could be a transparency on classification level where
> QgsSymbol has its own transparency (OGC SLD style).
> Am Mittwoch, 26. August 2009 09.21:33 schrieb Andreas Neumann:
>> Hi QGIS developers,
>> For QGIS 1.3 (or whatever the successor is called) I would like to
>> whether we can add group transparency in addition to the regular layer
>> This is a concept available in SVG. The difference is that with group
>> opacity/transparency, the layers in the group are rendered first
>> individually (with or without opacity) and then the transparency is
>> on the intermediate rendering result of the group as a whole.
>> The difference is clearly seen if you have layers in a group where
>> polygons of different layers overlap. You don't want opacity on the
>> individual layers (since this would change colors), but you want to be
>> able to set the opacity on the parent group, for being able to have a
>> background base map shine through.
>> Here are two links on the topic:
>> Maybe something to discuss at the Vienna meeting?
>> Should I file a feature request?
> Dr. Marco Hugentobler
> Institute of Cartography
> ETH Zurich
> Technical Advisor QGIS Project Steering Committee
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