TAG APPLICATION SYSTEM, CACHE SERVER AND CONTROL METHOD OF CACHE SERVER

To provide a tag application system for efficiently acquiring information necessary for tag application to objective data from an information server.SOLUTION: A cache server communicative with a tag application device is controlled so that the cache server includes first position information for specifying a first point which is indicated at objective data which are acquired by a vehicle, an attribute information requirement for requiring the transmission of first attribute information indicating an attribute of the first point is received from the tag application device, a second position indicated at data which are acquired by a sensor on and after the objective data on the basis of the first position information, when the first attribute information is not stored in a storage, second position information for specifying the first position information and the second point is transmitted to an information server, second attribute information indicating attributes of the first attribute information and the second point is received from the information server, the first attribute information and the second attribute information are associated with the first position information and the second position information, respectively, and stored in the storage, and the first attribute information is transmitted to the tag application device.SELECTED DRAWING: Figure 1 【課題】対象データへのタグ付与に必要な情報を効率よく情報サーバから取得するタグ付与システムを提供する。【解決手段】タグ付与装置と通信可能なキャッシュサーバを、車両にて取得された対象データに表される第１地点を特定する第１位置情報を含み、第１地点の属性を示す第１属性情報の送信を要求する属性情報要求をタグ付与装置から受信し、第１位置情報に基づいて、センサが対象データ以降に取得するデータに表される第２地点を予測し、第１属性情報がストレージに記憶されていない場合、第１位置情報と第２地点を特定する第２位置情報とを情報サーバに送信し、第１属性情報と第２地点の属性を示す第２属性情報とを情報サーバから受信し、第１属性情報と第２属性情報とをそれぞれ第１位置情報と第２位置情報とに関連づけてストレージに記憶し、第１属性情報をタグ付与装置に送信するよう制御する。【選択図】図１