drawings the explanation which will be given below shows such an example that the present invention is applied to an on vehicle navigation apparatus fig1 shows a configuration of a navigation apparatus 1 as shown in fig1 the navigation apparatus 1 includes a stand alone position measurement device 10 a gps receiver 18 a system controller 20 a disc drive 31 a data storage unit 36 a communication interface 37 a communication device 38 a display unit 40 a sound output unit 50 an input device 60 and a sound recognition unit 70 the stand alone position measurement device 10 includes an acceleration sensor 11 an angular velocity sensor 12 and a distance sensor 13 the acceleration sensor 11 includes a piezoelectric element for example and detects the acceleration degree of the vehicle and outputs the acceleration data the angular velocity sensor 12 includes a vibration gyroscope for example and detects the angular velocity of the vehicle at the time of changing the direction of the vehicle and outputs the angular velocity data and the relative direction data the distance sensor 13 measures a vehicle speed pulse including a pulse signal generated with the wheel rotation of the vehicle the gps receiver 18 receives an electric wave 19 for transmitting downlink data including position measurement data from plural gps satellites the position measurement data is used for detecting the absolute.