Length
Definition of length
Yeh, Sure... You might be able to figure this one out yourself. But for those having a week spot for topography and geodesy, we do take into account the curvature of the Earth.
Got you interested? Read more about distance calculations.
Difficulty level (relative)
The Difficulty level is expressed as a value 1/10 (very easy) to 10/10 (very difficult). 1/10 indicates that for this variable there are 90% of the routes more difficult. 10/10 indicates that for this variable there are 90% of the routes more easy.