Abstract: A population or a population change in an particular area is accurately estimated based on the number of communication terminals existing in the area.

Abstract: A computer is caused to perform a communication environment information acquisition procedure; a procedure that acquires position information; a procedure that, when the computer is located in a positioning-difficult area or in a positioning-inaccurate area, acquires movement information; and a procedure that identifies a position at which the communication environment information acquisition procedure was performed in the positioning-difficult area or the positioning-inaccurate area, based on the movement information and the position information that is measured by the positioning means in a positioning-possible area where the positioning accuracy of the positioning means is higher than a predetermined value after the computer has moved from the positioning-difficult area or the positioning-inaccurate area to the positioning-possible area.

Abstract: A log information obtaining unit which obtains log information; a population information obtaining unit which obtains local population information indicating a population of a local area; a first terminal extraction unit which extracts, based on the log information, a wireless terminal present in the local area in a particular time from among the one or more wireless terminals; a relation parameter deriving unit which derives a relation parameter representing a relation between the number of wireless terminals and the population based on a population of the local area indicated by the local population information and the number of wireless terminals extracted by the first terminal extraction unit; and an estimated value deriving unit which derives an estimated population value from the number of wireless terminals by using the relation parameter are comprised.

Abstract: To judge whether there is roaming, a computer is caused to perform a position information acquisition procedure to acquire position information of the computer, a connection carrier information acquisition procedure to acquire connection carrier identification information for identifying a communication carrier of a communication network to which the computer is connected at the position where the position information was acquired, and a log information generation procedure to generate log information in which the position information and the connection carrier identification information are associated with each other.

Abstract: It is difficult to distinguish facility types. It is difficult to estimate a fluctuating population from the number of communication terminals. A log information obtaining unit which obtains log information in which positional information of a wireless terminal and clock time information at which the positional information is obtained are associated, a population fluctuation pattern determination unit which determines a population fluctuation pattern based on the log information, a type determination unit which determines a type of a facility based on the population fluctuation pattern determined by the population fluctuation pattern determination unit, with reference to basic pattern information indicating a population fluctuation pattern for each facility type, and an estimated value deriving unit which extracts calculation basic information corresponding to the facility type determined by the type determination unit to derive an estimated value of the population movement of the facility are comprised.

Abstract: A computer having a communication function is caused to receive user instructions designating execution of a process other than a process for acquiring information relating to a communication environment; execute the process designated by the user instructions; acquire information relating to the communication environment of the computer, when the user instructions are received or when the process indicated by the user instructions is executed; and acquire position information of the computer, when the user instructions are received or when the process indicated by the user instructions is executed.

Abstract: A computer having a communication function is caused to receive user instructions designating execution of a process other than a process for acquiring information relating to a communication environment; execute the process designated by the user instructions; acquire information relating to the communication environment of the computer, when the user instructions are received or when the process indicated by the user instructions is executed; and acquire position information of the computer, when the user instructions are received or when the process indicated by the user instructions is executed.