| 摘要 |
<p>Each of a plurality of moving bodies (3-1,...3-n) detects its present location, e.g., by using a position-determining signal transmitted from a GPS satellite (6), and transmits (5) positional information to a centre control apparatus (1). Based on the positional information from the respective moving bodies, the centre control apparatus generates necessary image information and displays (11) positions of the respective moving bodies such that they are superimposed on a map including the entire operating area. Alternatively, moving bodies existing in a specified smaller area are searched for, and their positions are displayed on a map including the specified area. <IMAGE></p> |
