[Qgis-user] Overlapping

[Michael Williamson]

I am sure this is easy but I can't work out which facility to use

 

I have two layers. Layer A is made up of some large polygons while Layer B
is made up of smaller polygons. The Polygons in Layer A overlap one or more
of the polygons in layer B. In most cases the overlap is 100% but there are
a few cases where the overlap is less than that.

 

Layer B contains population and other data as numerical attributes and I
want to populate corresponding attributes in layer A with the weighted total
of the attributes in layer B depending on the amount of overlap.

 

I have found various tools but I cannot work out which one to use. The ones
I have found seem to do part of the job but not all of it.

 

Can anyone help?

 

Kind regards

 

Michael Williamson

 

The Willows

Long Drove

Waterbeach

Cambridge  CB25 9LW

Tel: 01223 860899 Mobile: 07836 748587

 

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