| 摘要 |
A server includes: an input information database 14 for storing input information in which position information indicating a geographical position and a user ID specifying a user having performed an input operation relating to the geographical position are associated with each other; a decision unit 17 for determining whether a plurality of common users performed the input operation in a predetermined number or more of common geographical ranges, by referring to the input information database 14; and an association unit 18 for, when it is determined that the plurality of common users performed the input operation in the predetermined number or more of common geographical ranges, associating multiple pieces of input information, which correspond to the plurality of common users and respectively include pieces of position information indicating geographical positions included in a common geographical range, with each other by extracting the multiple pieces of input information and then allocating a common identifier to the extracted multiple pieces of input information, for each of the predetermined number or more of common geographical ranges. |
