Sensing and privacy
Data latency
Latence des données
Data latency is the delay between an event or observation and the time its information becomes available for use. Curb information can accumulate delay through sensing, communication, processing, and publication, so a recent request timestamp does not necessarily mean that the underlying vehicle observation is equally recent.
Understanding the term
Publish observation time separately from update time. Applications can then distinguish a genuinely fresh vacancy signal from an unchanged record returned by an active server.
Validate the measurement against an independent reference under representative conditions. Record uncertainty, coverage, missing intervals, and the difference between a raw observation and an inferred activity. Technical outputs should be used only for purposes they can support reliably. Assign responsibility for calibration, corrections, access, and retention, and assess privacy across the complete data flow. An operational dashboard can conceal measurement errors if it displays precise values without their method or limitations.