Wrong segments (specially public transport)

datamapio / posmo_one_testing

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Wrong segments (specially public transport) #9

Open thohug opened 4 years ago

thohug commented 4 years ago

Bern/Zurich, Switzerland, Android

geofence: 0 do_not_track: 0 wifi_over_gps: 1 data_over_wifi_only: 1

Issue

Yesterday I got several wrong segments:

-> Train trip from Zurich HB to Wiedikon (recognised as walking, with a stop which is wrong)

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-> train trip to Bern starting off from Oerlikon (instead of Zurich HB); wasn't in Oerlikon at the time & train trip to Bern isn't tracked (GPS seemed available & blue dot was moving on the map when I checked)

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-> Getting to wankdorf was a mixture of car and "other" instead of train -> way back to Bern HB was correctly recognised as bike, though the tracking is off (incorrect route)

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-> way back to Zurich wasn't tracked at all (would have been interesting as the train was rerouted).

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rogerfischer commented 4 years ago

Trains in CH are the hardest as a lot of data points are missing and there a big GPS jumps. We will look into the raw data and come back to you.

What were the train trips in sequence?

HB to Wiedikon (Wiedikon to HB?)
HB to Bern
Bern to HB (rerouted)?

cc @aelvyr @djr4

aelvyr commented 4 years ago

I will take a look at the predicted transport modes for the given times, as this seems to be a problem with either the data collection or the model prediction. We hope we can solve this issue for you as soon as possible.

djr4 commented 4 years ago

I looked at this yesterday, train was not predicted when this happens there is no train inference. Also I wouldn't map match car at all ...

thohug commented 4 years ago

Trains in CH are the hardest as a lot of data points are missing and there a big GPS jumps. We will look into the raw data and come back to you.

What were the train trips in sequence?
* HB to Wiedikon
  (Wiedikon to HB?)

* HB to Bern

* Bern to HB (rerouted)?
cc @aelvyr @djr4

correct is Wiedikon to HB, and additionally Bern - Wankdorf // Wankdorf - Bern (today again same story, Bern-Wankdorf was mistaken for a car-trip)

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rogerfischer commented 4 years ago

@thohug

Can you confirm: The train sequence is: Wiedikon - HB HB - Bern Bern - Bern Wankdorf

The best - if you are up to it, would be a) to relabel your raw data or b) record the train segments with Posmo Segments with precise Start and Stops.

Contact me at roger at datamap.io, to figure out what is the best option.