I’m 3 weeks into the world of ORS and QGIS for a thesis and the tool has been incredibly helpful so far so first off thank you for all the functionality!
I have a question about the assumed walking/hiking speeds - I read in another forum post that this is taken to be 5km/h unless an sac-scale is specified for a certain section of trail in which case it’s 2km/h.
To provide some context I’m looking at isochrone walking catchments (30, 60, 120min) in rural Africa so a lot of the speed limits, etc. will be default values for certain road/trail classifications I assume.
- What exactly is a sac-scale in the context of walking? Here (GitHub - GIScience/openrouteservice-docs: This repository stores the swagger specifications of the openrouteservice API. Browse to swagger for a detailed overview.) when looking at sac-scales there is a reference to mountain biking etc. which confused me slightly? So if a trail is a mountain bike trail (for example) the assumed speed is reduced to 2km/h?
- How do I check if a route (or which routes) has an sac-scale associated with them?
- How is walking different from hiking when calculating time catchments?
- In the absence of sac-scales is gradient information neglected when calculating isochrone walking/hiking time catchments? How could this information be factored in? (such as Tobler’s hiking formula based on gradient information)
Thank you in advance for all your help!