| 摘要 |
PROBLEM TO BE SOLVED: To execute easily modification of processed information obtained by processing a map in a portable map display device. SOLUTION: As a displaying method on a display, a lower layer 26 for displaying the map and an upper layer 27 for displaying the processed information are provided, and the processed information written on the upper layer 26 is overlapped with the map written on the lower layer 26 and displayed. Hereby, when the processed information is written, the map displayed on the lower layer 26 is not influenced. Therefore, only modification of the upper layer 27 is required in order to modify the processed information, and the processed information can be modified easily. |
