I am very new to Python scripting in QuantumGIS, so bear with me please.

I am trying to use the QgsOverlayAnalyzer class in QuantumGIS (http://www.qgis.org/api/classQgsOverlayAnalyzer.html#details) to automate the intersection between different layers (I have plenty of intersections to do).

However, I can't get it to work in the python console.. assume I want to intersect layer1 with layer2, and write the results in C:\shapefile.shp, I am trying something like this with no success:

QgsOverlayAnalyzer.intesection(layer1, layer2, "C:\shapefile.shp", false, 0)

The error I make must be quite serious, as the message I get is:

NameError: name 'QgsOverlayAnalyzer' is not defined

Any help on this is very much appreciated.


1 Answer 1


It seems that the correct answer is here.

You can access to that object importing the analysis module:

from qgis import analysis
  • Diegogb, thanks a lot! this is exactly what I was looking for, now it runs like a charme! Quite depressing though that yesterday I surfed the web for a few hours without managing to come across the page you linked me!
    – Dom
    Mar 20, 2013 at 9:22

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