描述设备位置的结构。
| altitude | Geographical device ___location altitude in meters. |
| horizontalAccuracy | Horizontal accuracy radius of the ___location in meters. |
| latitude | 设备位置地理纬度。 |
| longitude | Geographical device ___location longitude. |
| timestamp | Timestamp (in milliseconds from 1970) of when ___location data was last updated. |
| verticalAccuracy | Vertical accuracy radius of the ___location in meters. |