| 摘要 |
<p>PROBLEM TO BE SOLVED: To automatically determine a suitable range from which visitors visit facilities on purpose under no influence of peripheral attractive facilities without conducting any questionnaire survey.SOLUTION: Once a facility name is input, a facility name or abbreviation is acquired by referring to facility name storage means on the basis of the facility name, contributors which actually visited the facilities are extracted based upon the facility name or abbreviation from Web documents through context determination processing, and residences of the respective contributors are acquired by referring to user residence storage means on the basis of the extracted contributors. The famous rate of the facilities is acquired from facility famous rate storage means on the basis of the facility names, a threshold is found which is larger as a famous rate is larger, and distances between residences and the facilities are found, so that only residences whose distances are shorter than the threshold are considered as trade areas.</p> |
