| 摘要 |
PROBLEM TO BE SOLVED: To provide a proxy server and a program for transmitting to a terminal only a plurality of divided map images necessary and sufficient for a user to know a route. SOLUTION: The proxy server receives a request containing start point coordinates and end point coordinates from a terminal and, based on the start point coordinates and the end point coordinates, and determines a route on a map. Then, the proxy server selects divided map image identifiers of one or more divided map images necessary for displaying the route. The proxy server calculates coordinate system reference information from the image coordinates and geographical coordinates of the divided map image and, based on the coordinate system reference information, derives, on the route, route range image coordinates from route range geographical coordinates. Then, the proxy server creates index information containing the route range image coordinates, the coordinate system reference information, and the divided map image identifiers, and returns a response containing the index information to the terminal. COPYRIGHT: (C)2009,JPO&INPIT |
