Map generation device

A map generation device, which is applied to a system that controls operation of work machines including a haulage vehicle hauling a load and a loading machine loading the load on to the haulage vehicle, and generates travelable map information representing an area capable of being traveled by the haulage vehicle, the map generation device comprising:

• a map information storage unit storing the travelable map information;
• a work machine information accumulation unit accumulating position information representing a position of the work machine and operational information representing an operational status of the work machine;
• an operational range arithmetic unit calculating an operational range of the work machine on the basis of the position information and the operational information accumulated in the work machine information accumulation unit;
• and
• a map information update unit verifying the operational range of the work machine calculated by the operational range arithmetic unit against the travelable map information stored in the map information storage unit in order to correct a boundary of a working site in the travelable map information and then update the travelable map information.