You might have noticed that there's a difference in the distance/elevation data while you were recording your activity versus once your activity is saved and the data has synced with our servers. The reason is that GPS data from your phone is noisy. We're able to do moderate filtering within the app during the recording of your activity to keep your data somewhat clean, but a good chunk of data-smoothing and cleanup occurs during sync.
Sobald deine Aktivität abgeschlossen ist und du dich für das Speichern deiner Datei entscheidest, wird sie automatisch in die Warteschlange gestellt, um sie bei der nächsten stabilen Datenverbindung zu synchronisieren. Während der Synchronisation sind unsere Webserver in der Lage, die Daten zu glätten und deine Statistiken neu zu berechnen, damit sie viel genauer sind.
For elevation data changes specifically, the elevation gain will be most accurate once you've actually saved your activity.
Once you save your activity, your map is uploaded to the server, at which point we discard all the lat/long points taken from the locations while you were recording and use our own system to replace those elevation values. We then recalculate the total elevation gain based on those values, which will most often result in a lower number for total elevation gain then while you were recording your activity.