Elevation profile for tunnels.FORUMS HOME SEARCH FORUMS

Is there any way that the elevation profile tool can deal with paths (walking/cycling) which run through disused railway tunnels? 

I plotted a route along the Two Tunnels Greenway (Bath, UK ...see https://www.twotunnels.org.uk) where there are two disused rail tunnels converted to shared paths.

The elevation profile from a plotted route shows the profile of the landscape above the tunnels. 

Would this require a software change to cope with the concept of tunnels, whereby the heights above sea-level could be taken from the entrance and exits to the tunnels? 

Sorry Dave, we don't have access to the elevation data for the insides of tunnels and we wouldn't easily be able to add functionality to derive this, so it wouldn't be something we could do. I'm afraid there are a handful of scenarios like this which we can't cater for.

John

Hi
Further to this, this applies to all tunnels? Even proper roads (and not just abandoned railways in the west country)?

One tunnel on a route of mine in the Pyrenees adds about 800m of elevation, which really messes with the elevation/time estimates...

Otherwise, a great app... Thank you.

Hi Guy, yes, I'm afraid we don't have access to the elevation data for the insides of tunnels and it wouldn't really be feasible for us to add functionality to derive this.

John

One way to get an approximation (which, in many cases for tunnels, would be reasonably accurate) would be a simple tool to be able to:

1. Select a portion of the route by selecting two points (start and end)

2. Within this selected section, force the elevation to vary linearly between the start and end points (i.e. not follow the topography)

?

Compared to some of the other features, this sounds like it would be very simple to achieve!

It's not that easy unfortunately Guy. We calculate elevation profiles on the fly from a global static data source, so don't store elevation daa for each route, which would result in a huge amount of duplicate data that could not easily be updated.

John

RideWithGPS auto corrects for tunnels and bridges, or you can do it manually.  They explain how they do it here:

https://ridewithgps.com/news/5657-bridge-and-tunnel-elevation-data-improve?lang=en

It works very well on a browser plotted route, but doesn't seem to for routes plotted in the app