<p>Evaluates device positions against the geofence geometries from a given geofence collection.</p> <p>This operation always returns an empty response because geofences are asynchronously evaluated. The evaluation determines if the device has entered or exited a geofenced area, and then publishes one of the following events to Amazon EventBridge:</p> <ul> <li> <p> <code>ENTER</code> if Amazon Location determines that the tracked device has entered a geofenced area.</p> </li> <li> <p> <code>EXIT</code> if Amazon Location determines that the tracked device has exited a geofenced area.</p> </li> </ul> <note> <p>The last geofence that a device was observed within is tracked for 30 days after the most recent device position update.</p> </note> <note> <p>Geofence evaluation uses the given device position. It does not account for the optional <code>Accuracy</code> of a <code>DevicePositionUpdate</code>.</p> </note> <note> <p>The <code>DeviceID</code> is used as a string to represent the device. You do not need to have a <code>Tracker</code> associated with the <code>DeviceID</code>.</p> </note>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}