| 摘要 |
A navigation equipment for a moving vehicle which includes a magnetic field probe 1 and a travel distance meter 2 which supplies position values Xa, Ya using dead-reckoning navigation which can be checked with a street map. The street map is digitally represented in a plat memory 4 using a network 42 which has meshes comprising network elements 421. The network elements 421 uses a binary 1 which represents a street and in other positions utilize a binary 0. The addresses of the network elements 421 in the plat memory 4 are ordered according to an x-y coordinate system and are addressable with the position coordinates Xa and Ya. The correction stage 5 checks a position indication Xa, Ya for a street value 1 or a 0 (deviant value) and when k successive deviant values occur, they are successively shifted in direction until street values result. The resulting shift values are then added as a correction value to every position indication Xa, Ya afterwards. |
