AW: [Qgis-developer] Vector Overlay now in Trunk?

[Hugentobler Marco]

Hi Andreas

The placement algorithm is a global setting because the PAL library considers the objects of all layers together. Ok, it would also be possible to trigger the placement for layers individually, but it is in most cases preferrable if not diagrams from layer A overlap those of layer B.
I know that at the moment the placement gives not very good results. I'm meeting the PAL developers in two weeks to see if the code in qgis that calls the PAL library can be improved.

Regards,
Marco


-----Ursprüngliche Nachricht-----
Von: qgis-developer-bounces at lists.osgeo.org im Auftrag von Andreas Neumann
Gesendet: Do 16.04.2009 17:32
An: qgis-developer at lists.osgeo.org
Betreff: Re: [Qgis-developer] Vector Overlay now in Trunk?
 
yes - there are the placement algorithm options - as a separate tab in the
QGIS options.

However, I am not so sure if this should be a global setting. Shouldn't
this be layer-specific?

One layer probably should use this placement algorithm, while a different
layer might require a different placement algorithm. As an example a layer
with fewer diagrams may want to use a more sophisticated algorithm, while
a layer with lots of diagrams may want to use a faster algorithm. Also,
there may be different quality requirements for different layers or
projects.

So in my opinion the algorithm choice should be layer specific. Any
thoughts on why this is not a good idea?

Andreas


On Thu, April 16, 2009 4:28 pm, Borys Jurgiel wrote:
> W czwartek, 16 kwietnia 2009 roku o godzinie 16:18:40 ³askaw(a) by³(a)
> Pan(i)
> rzec:
>> yeah - you are right. I did not enable the plugin "Diagram Overlay"
>>
>> Seems to work now - thanks!
>
> There is something more - a new tab in the main 'Options' dialog
> containing a
> placement method. However I can't figure out if/how it works... I'm sure
> Marco
> was speaking about it in Hannover, but I evidently missed it...
>


-- 
Andreas Neumann
http://www.carto.net/neumann/
http://www.svgopen.org/

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