Doing network analysis in QGIS. This is where I came from:
- Start situation: + 600 points with fid and 1 relevant attribute. Also road network data.
- First step: ran "network tools - service area (from layer)" with 3000 meters. Result: line features covering 3000 meters of the road network from each point.
- Second step: the same thing but 5000 meters.
So in this point I have two line data layers, both with +600 features. One row in each table represents one service area and has the original fid + one relevant attribute.
Now I should subtract the 3000m service areas from the 5000 service areas in order to find those lines that are exactly between 3000m and 5000m from the point. How should this be done? I of course want to subtract the corresponding fids (eg. 5000m fid =145 subtracted with 3000m fid=145).