When you upload a flight log, we parse it, compute flight statistics, derive a regional wind reference, and generate a trajectory image and a PDF report.
· Your original uploaded log is processed in a temporary file and deleted immediately after processing — it is never kept.
· Generated images and PDF reports are deleted automatically after 24 hours.
· If you opt in to sharing, only a de-identified version may be kept for up to 30 days: relative trajectory (metres from the first point), elapsed time, height above the take-off point, speed and heading. Raw GPS coordinates, absolute UTC timestamps and the absolute sea-level altitude are removed.
We do not retain your original filename, name, email, phone number or postal address. We do not store your IP address with your flight data.
Sharing de-identified data is off by default and requires an explicit opt-in checkbox. Your report shows a random data ID; paste it at /delete-data to delete that copy immediately. No account or email address is needed, and deletion is permanent.
Wind information is a regional historical weather reference (Open-Meteo / NASA POWER), not a local real-time measurement.
The interactive track map runs in your browser. Satellite tiles are loaded directly from Esri and 高德; those tile requests necessarily include the map area being viewed. We do not store map views, coordinates or tile requests.