1. An information processing device comprising: at least one memory operable to store program code; at least one processor operable to read the program code and operate as instructed by the program code, the program code including: code configured to cause the at least one processor to store, in a local area word memory, a local area word indicating a local area in association with geography information for specifying the local area; article data acquiring code configured to cause the at least one processor to acquire article data; characteristic word extracting code configured to cause the at least one processor to extract characteristic words from text of the article data; determining code configured to cause the at least one processor to, by comparing the characteristic word and each of the local area word stored in the local area word memory, determine whether or not the characteristic word matches any of the local area word; search result code configured to cause the at least one processor to request a search device to perform a web search by using the characteristic word as a keyword and acquire a search result from the search device, the characteristic word being determined not to match any of the local area word; local area specifying code configured to cause the at least one processor to specify a local area related to the article data based on the search result acquired by the search result code, and locate geography information; article content specifying code configured to cause the at least one processor to match article content of the article data and a predetermined keyword, and specify the article content of the article data as at least one of the predetermined keyword; code configured to cause the at least one processor to store, in an article data memory, the article data in association with at least one of the predetermined keyword and the specified local area; mapping code configured to cause the at least one processor to map a symbol corresponding to the article data on a map based on the specified local area; and relevant article collecting code configured to cause the at least one processor to refer to the article data memory, and collect information about articles related to the specified local area and the specified article content, wherein: the local area specifying code causes the at least one processor to store the specified characteristic word in the local area word memory as the local area word in association with the specified local area; the mapping code causes the at least one processor to map symbols in accordance with a number of the collected articles; the search result code causes the at least one processor to search for a plurality of related words around the specified characteristic word; and the local area specifying code causes the at least one processor to specify the local area from the related words, and locate the geography information.