| 摘要 |
A navigation system 1 is provided with a present spot locating section 50 for receiving location information on a present location sent by dual-tone multi-frequency signals from a terminal device 2 and searching through longitude/latitude data 62 therein to obtain longitudinal and latitudinal data on the present location; a destination spot locating section 51 for receiving location information on a destination location sent by dual-tone multi-frequency signals from the terminal device 2 and searching through longitude/latitude data 62 therein to obtain longitudinal and latitudinal data on the destination location; and a location computation section 52 for computing distance and/or direction between the present location and the destination location based on the longitudinal and latitudinal data on the present and destination locations, and providing a voice report of computed results to the terminal device 2. The navigation system 1 is further provided with an advertisement processing section 54 for transmitting commercial voice messages contained in the advertising message data.
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