I am using QGIS 2.18.14. I want to create line through contour lines with fixed segments, automatically. I already tried manually with 'Advanced Digitizing Tools'. It works fine but too slow. The goal is, if I enter the length of the segment e.g. 100m, automatically connect contour lines from a given point to a point target, Or from the selected contour line to the other selected contour line. I think this is possible with some python script but I am beginner in python scripting. I would be pleased with the answer that this could be done, so I would somehow, step by step, solve it. Equidistance of contour lines is 10 m.