A computer readable medium storing a map information processing program in a manner readable by a computing section, the program executing a map information processing method for displaying a current position overlaid onto a map on a display of a terminal unit connected to a server unit that stores a map information over a network in a manner capable of sending/receiving various information, the program being executed by a computing section,
- the map information processing method executed by the computing section, comprising the steps of:
- generating a current position information for a current position at the terminal unit;
- acquiring the current position information at the server unit from the terminal unit over the network;
- correcting the current position information at the server unit so that the current position is on a road represented by a point information and a segment information of a matching data of the map information including the plurality of point information that has a coordinates information and a unique point information and represents predetermined points and a segment information that has a unique segment information and connects the pair of point information;
- acquiring the corrected current position information and the matching data at the terminal unit from the server unit over the network;
- displaying the represented road based on the point information and the segment information of the acquired matching data on the display of the terminal unit, and overlaying the acquired and corrected current position information onto the road displayed on the display, the matching data including a matching mesh information divided in a predetermined areas;
- acquiring a display data for displaying the map information, the display data including a component data representing a component of the map of a predetermined area, and including a plurality of display mesh information divided in a predetermined areas;
- and
- displaying on the display:
- the matching mesh information including the point information and the segment information representing the road corresponding to the travel route;
- and the display mesh information corresponding to areas not covered by the areas represented by the matching mesh information.