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Deviation from ground truth, end to end, over the public network. Measured, not claimed.
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Hoscorp builds instruments. The instruments are given to volunteers. The volunteers drive, and the instruments record, and the recordings are kept.
We are told this is a leaderboard. It is also a very large number of accelerometer traces from a very large number of ordinary cars, retained at full resolution, in the Netherlands, indefinitely.
An application for an ordinary telephone. It waits. When the vehicle departs from rest and passes one hundred kilometres per hour, it records the interval and everything that happened during it.
The subject is shown a number and an uncertainty. The subject is not shown the model that produced the number, because the model changes. Each time it changes, every recording ever made is measured again. Nobody has to drive twice.
Volunteers describe this as a game. We have not corrected them.
Deviation from ground truth, end to end, over the public network. Measured, not claimed.
Verifications standing. Several exist because a vehicle in the field disagreed with a belief held here.
Characters of position retained per observation. Approximately twenty kilometres. Deliberate.
Advertising identifiers. Analytics libraries. Third parties with whom any of this is shared.
Every one of these is stated plainly, without ceremony, and in checkable detail in the disclosure document. It is written to be tested against the instrument's behaviour rather than to protect us. Where a claim there is specific, it is specific because the code does that specific thing.
Correspondence is answered. Requests for access to, correction of, or erasure of anything held about you are answered within thirty days, and erasure means erasure — the profile, the vehicle, the recordings and the raw signal.