| 摘要 |
According to the first aspect of the present invention, there is a data server (110) providing modified route information to a first user terminal (130) used by a first user, comprising a receiving unit (114) configured to receive a request from the first user terminal for requesting a second user terminal (120) used by a second user to modify route information, a geographical database (113) configured to store geographical data, a route information generation unit (112) configured to generate the route information indicating a route from a first location to a second location, using the geographical data, and a transmitting unit (115), configured to transmit a route modification request with the generated route information to the second user terminal. The receiving unit is further configured to receive modified route information from the second user terminal (120). The transmitting unit is further configured to transmit the modified route information to the first user terminal (130).
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