I have two overlapping isochrones -- 10 minutes by bike from 2 neighbouring railway station -- and I want to split them in a balanced way, so as to determine the bikeshed of each railway station. The separation should occur at equi-distance from each station.
On the image form QGIS the green polygons are the isochrones around railway stations represented by red stars. I have added a red line showing where I would like the two isochrones to be separated. How could I process this in QGIS?