#2910: underground, landmarks
, last check: Tue, 11 Feb 2025. Post history
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Offline motion detection based on the signature of vibration frequencies allows for precise positioning in underground transportation where GPS does not reach
https://blog.transitapp.com/go-underground/ -
More than 84,000 delimitation landmarks (terms) located and mapped in the IGN France campaign to recover this heritage, which dates back several centuries.
[FR]
https://macarte.ign.fr/carte/H9R6EZ/Ensemble
Raf