| 摘要 |
The invention relates to device for coding and decoding locations in a traffic lane network, information concerning said locations being transmitted each time from a transmitter to a receiver. In said device, a code is composed of a specified part and a co-ordinate part corresponding to each coded location, said co-ordinate part comprises several pairs of co-ordinates representing each the co-ordinates of the coded location stored on the transmitter side, and at least one other pair of co-ordinates representing an additional point. Said specified part must contain at least the number of co-ordinate pairs contained in the co-ordinate part, the position of the co-ordinate part of the coded location in the co-ordinate part, and an indication relative to the type of coded location. For decoding purposes, the position on a corresponding traffic lane and other location information, locations within tolerance range of received co-ordinate pairs are determined in a location data bank containing the co-ordinates. Following said determination, the locations situated on a common traffic lane are selected and among said selected locations, the location which falls within the tolerance range of the defined co-ordinate pair is defined as the decoded location.
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