| 摘要 |
PROBLEM TO BE SOLVED: To specify a change in a degree of a user's usage in a certain area.SOLUTION: An information processor calculates a first degree being a degree of stay in a first area during a first period about users with a portable terminal staying in the area during the period with reference to positioning information, and calculates a second degree being a degree of stay in the first area during a second period about users staying in the first area during the first period. The information processor specifies a user whose difference between the first degree and the second degree is equal to or greater than a prescribed threshold. |
