I am using different shapefiles from open data in Switzerland. They have just updated the whole set. My question is: how to compared two layers (new and old version)? I would like to know the differences in geometry, as well as attributes. In the data there are points, lines and polygons and some of the sets contains a big amount of features (more than 300 000 elements).
I have already checked all the simillar questions, but they all focus on creating the third layer with differences or particular layer example.
What I want to know is just what has been changed.
I am working with QGIS 2.14.3 and i am familiar with python.