A method and server computer for generating map images and providing the map images to users through the Internet are described. Web sites are automatically and recursively visited and downloaded through hyperlinks. Content items containing address and establishment information are retrieved from the information as downloaded from the visited web sites. The content retrieved items are indexed to associate the address information items contained therein with the establishment information items contained therein about establishments which are located in the addresses associated therewith respectively. A visual indication indicative of the establishment corresponding to an establishment information item is superimposed on a map image in a position corresponding to the address of this establishment with reference to the indexed content items. The map image is transmitted to a user through the Internet in response to a request message from the user.