An information processing device comprising: a local area word memory means that stores a local area word indicating a local area in association with geography information for specifying the local area; an article data acquiring means that acquires article data; a characteristic word extracting means that extracts characteristic words from the article data; a characteristic word specifying means that specifies a characteristic word which is not stored in the local area word memory means as the local area word, from the extracted characteristic words; a search result means that acquires a result of searching performed in a search device, according to the specified characteristic word; and a local area specifying means that specifies a local area related to the article data based on the search result of the search result means, and finds geography information, an article content specifying means that specifies article content of the article data; an article data memory means that stores the article data in association with the specified article content and the specified local area; a mapping means that maps a symbol corresponding to the article data on a map based on the specified local area; and a relevant article collecting means that refers to the article data memory means, and collects articles related to the specified local area and the specified article content, wherein: the local area specifying means stores the specified characteristic word in the local area word memory means as the local area word in association with the specified local area; and the mapping means sets the size of a symbol in accordance with a number of the collected articles. a local area word memory means that stores a local area word indicating a local area in association with geography information for specifying the local area; an article data acquiring means that acquires article data; a characteristic word extracting means that extracts characteristic words from the article data; a characteristic word specifying means that specifies a characteristic word which is not stored in the local area word memory means as the local area word, from the extracted characteristic words; a search result means that acquires a result of searching performed in a search device, according to the specified characteristic word; and a local area specifying means that specifies a local area related to the article data based on the search result of the search result means, and finds geography information, an article content specifying means that specifies article content of the article data; an article data memory means that stores the article data in association with the specified article content and the specified local area; a mapping means that maps a symbol corresponding to the article data on a map based on the specified local area; and a relevant article collecting means that refers to the article data memory means, and collects articles related to the specified local area and the specified article content, wherein: the local area specifying means stores the specified characteristic word in the local area word memory means as the local area word in association with the specified local area; and the mapping means sets the size of a symbol in accordance with a number of the collected articles. the local area specifying means stores the specified characteristic word in the local area word memory means as the local area word in association with the specified local area; and the mapping means sets the size of a symbol in accordance with a number of the collected articles.