Abstract: A vehicle position calculation apparatus and method are provided to correct a vehicle position to be located on a map route. The vehicle position calculation apparatus has a vehicle position measuring section measuring a vehicle position, a road data supply section supplying road geometrical data including a line segment and a closed region correlated with a road on a map, and a vehicle position correcting section correcting the vehicle position on the map by using the road geometrical data. The position correcting section locates the vehicle position by itself on the map as a corrected vehicle position, in response to a relatively positional relation between the vehicle position and the road geometrical data. In such a correction, the vehicle position correcting section can correct the vehicle position to be in alignment with a point on corresponding one of position correction shapes, or it can correct the vehicle position onto a traveling link generated in response to the road geometrical data.

Abstract: A vehicle cruising control device has a vehicle-position/traveling-direction calculating circuit 21 which receives data from a GPS signal receiver 11, a vehicle speed sensor 12, an angular-velocity sensor 13 and a map data base 30 to specify a road on which the vehicle is traveling and a road property gain circuit 23 which gains a sort of road from the map data base 30, as road property. In the device, a driving force control unit 40 controls a vehicle driving unit 50 on the ground of the sort of road. If the map matching becomes to be improper, then the road property gain circuit 23 operates to maintain the road property just before malfunction of the map matching until a traveling-distance after malfunction of the map matching reaches a predetermined distance. The traveling-distance is calculated by a traveling-distance calculating circuit 22.

Abstract: In a stereoscopic landform display apparatus disclosed herein, landform data comprising altitude value of landform are stored in an external storage (3), and when a display subject region to be displayed is designated by a display reference point and-the-like output section (5), landform data designated by this display subject region are read from the external storage (3), altitude magnification for emphasizing and displaying undulation state is obtained by a computation unit (1) based on landform data in this region, a computation of a stereoscopic landform image is performed from an altitude value which is multiplied by this altitude magnification, and this stereoscopic landform image is displayed to an image display section (7).

Abstract: A vehicle position calculation apparatus and method are provided to correct a vehicle position to be located on a map route. The vehicle position calculation apparatus has a vehicle position measuring section measuring a vehicle position, a road data supply section supplying road geometrical data including a line segment and a closed region correlated with a road on a map, and a vehicle position correcting section correcting the vehicle position on the map by using the road geometrical data. The position correcting section locates the vehicle position by itself on the map as a corrected vehicle position, in response to a relatively positional relation between the vehicle position and the road geometrical data. In such a correction, the vehicle position correcting section can correct the vehicle position to be in alignment with a point on corresponding one of position correction shapes, or it can correct the vehicle position onto a traveling link generated in response to the road geometrical data.

Abstract: A vehicle cruising control device has a vehicle-position/traveling-direction calculating circuit 21 which receives data from a GPS signal receiver 11, a vehicle speed sensor 12, an angular-velocity sensor 13 and a map data base 30 to specify a road on which the vehicle is traveling and a road property gain circuit 23 which gains a sort of road from the map data base 30, as road property. In the device, a driving force control unit 40 controls a vehicle driving unit 50 on the ground of the sort of road. If the map matching becomes to be improper, then the road property gain circuit 23 operates to maintain the road property just before malfunction of the map matching until a traveling-distance after malfunction of the map matching reaches a predetermined distance. The traveling-distance is calculated by a traveling-distance calculating circuit 22.