| Towards Increasingly Update Efficient Moving-Object Indexing Recent countries visiting this post |  |
 | 3 | United States |
 | 1 | |
 | 1 | Japan |
 | 1 | Russian Federation |
| Towards Increasingly Update Efficient Moving-Object Indexing Recent countries visiting this post | |
| 3 | United States |
| 1 | |
| 1 | Japan |
| 1 | Russian Federation |