问题
Is it possible to have Cloud Anchors be accessed after 24 hours and/or the feature points re-activated?
回答1:
Cloud Anchors stored at Google ARCore Cloud Anchor Service expire after 24 hours.
At this time it's still impossible to access Cloud Anchors after 24 hours. Also Point Cloud is discarded after 7 days. It's potentially possible to use your own hosting service for Cloud Anchors, but in that case you'll be unable to use an ARCore Cloud Anchor API.
Once an Anchor is hosted successfully, the anchor becomes a Cloud Anchor and is assigned a unique Cloud Anchor ID. After this it lives twenty-four hours. Anchor IDs are exchanged using Firebase Realtime Database.
Anchors are resolved on the server side against the stored sparse point map.
- The sparse point map can be used for Cloud Anchor resolution requests for 24 hours after it is generated.
- Previously uploaded mapping data is never sent to a user's device.
And, as you said:
Raw visual mapping data uploaded to the cloud when hosting an anchor is discarded after 7 days.
来源：https://stackoverflow.com/questions/52250854/arcore-cloud-anchors-for-more-than-24-hours-or-feature-points-for-more-than-7