[Qgis-user] Calculate intersecting area of two layers in a virtual field. Context of @geometry in overlay_intersects()

[Klaus Affeldt]

Hello Abi,

good hint. Especially if you have large datasets one should better use static processes instead
of the dynamic overlay functions. 

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Klaus Affeldt

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> Hello List, Hello Bruno and Klaus -
> 
> (Long time lurker, first time poster)
> 
> Easy way to get the area of intersecting polygons is to do the "union" from the vector drop down menu.
> Make sure there is something in the attribute table that helps you know which layer is which.
> Then you get a layer which includes a) the polygons in both, b) the polygons in one but not the other and c) the polygons in the other but not in the first!
> Then just run stats to get the area you need.
> 
> Abi
> 
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