TERMINAL DEVICE HAVING ELECTRONIC MAP FUNCTION, METHOD AND PROGRAM FOR CREATING HISTORY OF ELECTRONIC MAP, AND RECORDING MEDIUM WITH THE PROGRAM RECORDED THEREON

摘要

PROBLEM TO BE SOLVED: To reduce the number of logs recorded as history after surely recording high priority logs, and enhance convenience when a user tries to restore past processing states.

SOLUTION: A portable terminal includes a portable electronic hazard map executing program 41 for reading out and displaying an electronic map according to user's operations. Every time the internal state of the portable electronic hazard map executing program 41 changes according to the user's operation, information to indicate the internal state after the change of the state, variation weight and time-interval weight of the internal state is respectively written on a state log table 321, and lapse time weight is written on the state log table 321 according to the calling operation of a history calling program 422. Then, on the basis of each weight, scores are calculated and compared with a threshold value. The log information whose score exceeds the threshold value is extracted as an object to be stored, and is stored in a history table 322 together with its naming information.

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