| 摘要 |
PROBLEM TO BE SOLVED: To provide an encoding method for encoding a plurality of position information into a character string which is sufficiently short on practice by a simple algorithm, and for varying precision during compression. SOLUTION: This geographical coordinate information reversible compression method is achieved by using a compression rule to convert a plurality of geometrical information into data with fixed length, and to successively compare the information of the second and following points with the information of a previous point in a sequence from the most significant digit with fixed length digit as the reference of compression to a low order digit, and to when the both information is the same value, omit it, and to express only the section of at least the digits where different values are generated. COPYRIGHT: (C)2009,JPO&INPIT
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