Extrapolation of current position in tunnels
Quote from David_G on 10.01.2021, 17:56Coming from the "Navigon" app for iOS, I've always loved that the current position is being extrapolated based on the vehicle speed you had before entering the tunnel.
This way, you also got voice guidance incase there is an exit INSIDE or directly after the tunnel (when the GPS signal still is absent).
Also INTERpolation of the current position would be a nice bonus for making the map movement smoother đ
best regards, David
Coming from the "Navigon" app for iOS, I've always loved that the current position is being extrapolated based on the vehicle speed you had before entering the tunnel.
This way, you also got voice guidance incase there is an exit INSIDE or directly after the tunnel (when the GPS signal still is absent).
Also INTERpolation of the current position would be a nice bonus for making the map movement smoother đ
best regards, David
Quote from Guido on 11.01.2021, 10:37Thanks again David. This should be possible with Scenic 3's new map provider framework.
Thanks again David. This should be possible with Scenic 3's new map provider framework.
Quote from Foxthorn on 17.08.2024, 14:52I know this is an old thread but wanted to ask about support for tunnels.
On a recent trip to Norway (lots of tunnels!) I recorded all my rides and most of them I had cases where the recorded track snapped back to some other point when entering/exiting a runner... example shown below.
Is this a known issue - is there a way to help prevent this?
I know this is an old thread but wanted to ask about support for tunnels.
On a recent trip to Norway (lots of tunnels!) I recorded all my rides and most of them I had cases where the recorded track snapped back to some other point when entering/exiting a runner... example shown below.
Is this a known issue - is there a way to help prevent this?
Quote from Guido on 18.08.2024, 07:14Not at the moment, sorry. I'm working on a big update for October, though, which gives me more / deeper access to how coordinates are processed. There, I will be able to filter out these "jumps".
Not at the moment, sorry. I'm working on a big update for October, though, which gives me more / deeper access to how coordinates are processed. There, I will be able to filter out these "jumps".
Quote from windingroad38 on 23.06.2025, 04:47any news on that? Still jumping or frozen position in tunnels with v4.20
If the map knows the position and length of a tunnel, Scenic should switch from GPS Speed to constant speed  at tunnel entry, resuming GPS Speed when exiting the tunnel. This constant speed couldâve either last actual speed or known speed limit. This would imho be better than frozen position or crazy position jumps.
Using the gyros of a phone might be a little overengineering for a smartphone appâŚ
any news on that? Still jumping or frozen position in tunnels with v4.20
If the map knows the position and length of a tunnel, Scenic should switch from GPS Speed to constant speed  at tunnel entry, resuming GPS Speed when exiting the tunnel. This constant speed couldâve either last actual speed or known speed limit. This would imho be better than frozen position or crazy position jumps.
Using the gyros of a phone might be a little overengineering for a smartphone appâŚ
Quote from charlotteemma on 24.06.2025, 01:48In tunnels, where GPS signals are often unavailable, GPS receivers can extrapolate a vehicle's position based on its last known location, speed, and direction, along with map data. This "dead reckoning" method provides a reasonable estimate of location, particularly when the tunnel is straight and the distance traveled is not too great. The spatial distribution of underground tunnels is significant to the stress redistribution in the surrounding rock masses and blast wave propagation.This paper undertakes a thorough investigation into current vehicle localization technologies and methods for tunnel scenarios. The present work proposes an extrapolation methodology that allows the local duplication of a hypersonic boundary layer at off-stagnation locations around a ...
In tunnels, where GPS signals are often unavailable, GPS receivers can extrapolate a vehicle's position based on its last known location, speed, and direction, along with map data. This "dead reckoning" method provides a reasonable estimate of location, particularly when the tunnel is straight and the distance traveled is not too great. The spatial distribution of underground tunnels is significant to the stress redistribution in the surrounding rock masses and blast wave propagation.This paper undertakes a thorough investigation into current vehicle localization technologies and methods for tunnel scenarios. The present work proposes an extrapolation methodology that allows the local duplication of a hypersonic boundary layer at off-stagnation locations around a ...
