| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of the difficulty in distinguishing whether roads and facilities, such as buildings displayed on a map still exist at present or have existed in the past, since a former map is superposed on a present map and displayed. SOLUTION: For displaying an easy-to-see map, display data for highlighted display edited by a highlighted display data editing part 12 is superposed on display data for normal display, being edited by a normal display data editing part 13 and displayed. |
