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[mkgmap-dev] elevation in bridges and tunnels

From lig fietser ligfietser at hotmail.com on Thu Jan 20 08:20:28 GMT 2022

I've put an example on this forum (in Dutch). The brouter route (https://tinyurl.com/3nt27szy) shows a profile that is more accurate than the route in Basecamp.

Van: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> namens lig fietser <ligfietser at hotmail.com>
Verzonden: woensdag 19 januari 2022 23:55
Aan: Development list for mkgmap <mkgmap-dev at lists.mkgmap.org.uk>
Onderwerp: [mkgmap-dev] elevation in bridges and tunnels

Hi guys,
I came across this video on youtube, where ridewithgps.com improved their elevation profiles by ignoring the underlying altititude data of tunnel and bridges:
I found out that other route planners like brouter, cycle.travel and Osmand also ignores the surface altitude that lies above tunnels and underneath bridges, but mkgmap/Garmin does not. This leads to a much higher elevation gain or loss in the route profile than the actual ride. Is it possible for mkgmap to correct this issue, or is it hard coded in the Garmin Basecamp software?

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