Method of determining the core document geographic information system

The present invention discloses a method for determining geographical information document core of the system. Example method of determining document core geographic information, comprising: for each document according to the frequency of occurrence of geographical names, and calculating the weight value of each geographical name according to a predefined position weight; according to the preset geographical information database, the calculated said the same score administrative divisions of each geographical terms the level of membership; the geographical information database stores affiliation between geographical names as well as all geographic names; the highest score of geographic information at the highest score of the administrative division identified as the core geographical information of the document. With the present invention, it is possible to more accurately determine the core geographical information in the document content.