| http://www.w3.org/ns/prov#value | - ed in the packet received in the receiving step and the map data stored in the map data storing step; [0114] a step of selecting, from among the map data stored in the map data storing step, only map data including the route found in the route searching step; [0115] a billing step of calculating an amount of charge for the map data selected in the map data selecting step based on a price list incl
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