| 摘要 |
PROBLEM TO BE SOLVED: To perform continuous scroll along the nonlinear direction of management facilities by performing scroll in a shortest distance direction so as to turn adjacent facilities to the center of the display area of a display. SOLUTION: It is assumed that a map is displayed with the installation point Pi of the facilities on an expressway 201 as the center on the display and the display area 21 at the time is defined as W1-W4. In order to scroll the map to the installation point Pi+1 of the adjacent facilities in an incoming direction from the state, as preparation, line segments Pi and Pi+1 are equally divided so as to be an interval within a stipulated range, a start point Pi is defined as q0, division points are defined as q1, q2,..., and an end point Pi+1 is defined as qn. Then, the point q0 is moved to the point q1 and a quadrilateral W1-W4 after movement with the point as the center is defined as a new display area 22. By continuously repeating it at a high speed to the next point q2, q3,... up to the point qn, the continuous scroll to the adjacent facilities in the going up direction of the expressway 201 is realized. |
