| 摘要 |
PROBLEM TO BE SOLVED: To efficiently extract a maximum geographical range including a spot, a point, and an area to which attention degree is enhanced.SOLUTION: A GeoHash conversion part 13 converts a spot name and a place name included in Web document data into a GeoHash or address according to a geographical area of the name. A frequency count part 14 adds a score to the GeoHash or address, and also adds a score to a GeoHash or address indicating a wider geographical range including the GeoHash or address geographically, for calculating a total score for each GeoHash or each address. A burst determination part 15 determines presence/absence of a GeoHash or address whose total score is increased according to passage of time. A burst area extraction part 16 extracts the GeoHash or address whose total score is increased according to passage of time, based on the result of the determination. |
