[Qgis-user] Combined Layer Opacity

[Charlie Crowther]

Hi,

I will try and explain my query as simplistically as possible.

Basically, I have some landscape data split into 5 aspects (e.g.
cultural heritage, visual and sensory etc) with each aspect being shown
as a separate layer. Within each aspect/layer there are areas (of
differing sizes) that have been scored based on set criteria. What I am
hoping to show is a map with all five aspects/layers which overlay one
another and in effect add the scores so that areas of high combined
scores are darker and lower scores lighter. Using a graduated styling
(of scores calculated) with a 50% transparency seemed to work but when I
changed the Layer order the colouring/opacity kept changing.    

I think the following explains what I'm trying to
achieve...http://www.georeference.org/doc/layer_opacity.htm (see
paragraph headed 'Combined Layer Opacity').        

A friend recommends using the MCE Lite plugin as he believes I am trying
to carry out a multi-criteria analysis or the raster calculator to
basically add different raster to each other to come up with a score to
reflect all of the combined aspects. 

Any suggestions welcomed. Would appreciate a step by step guide on any
suggestions.

Many thanks.

Charlie  



 

Charles Crowther  BSc (Hons) MSc
Environmentalist
........................................................................
....
Energyline Ltd, York House, 9 York Place, Knaresborough, North Yorkshire
HG5 0AD

Tel: 01423 799950

Fax: 01423 799958

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