Performance transparency

Hallgren Johan E jhhal at WMDATA.COM
Wed Dec 19 09:49:19 EST 2007

Hello Friends


I a question regarding performance when using a transparent vectorlayer
on top of a rasterlayer. The output is quite large (1400 * 1000 px) and
vectordata is a shapefile with polygons. 


When turning the transparency on the vector layer the performance goes
down quite much. It takes maybe double as long time to produce the map.


Is there any knowledge about that?




Johan Hallgren


WM-data, Logica CMG

Pelle Bergs backe 3

Box 1938, 791 19 Falun

Tel (och mobil): 023-547 46 (int: +46-2354746)

johan.e.hallgren at
<blocked::mailto:johan.e.hallgren at>


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