| 摘要 |
<p>PURPOSE: To prevent the display of a high-priority marker from being hidden by the other marker at all times by displaying the information of a variable marker data base successively from the low-priority marker. CONSTITUTION: Data required for display are inputted to a process data base 4 by a process input part 5. Based on those data, a marker preparation processing part 31 of a marker preparing part 3 decides the display priority of markers, adds the priority numbers of respective markers and prepares a marker priority data base 34. The marker preparation processing part 31 prepares a variable marker data base 33 adding the symbol numbers and display colors of markers successively from the low priority. Then, a display processing part 22 displays the markers in the order of display data of markers. When there is the same display position of marker, the data existent in the high order inside the variable marker data base 33 are set to a display data base 21 and displayed on a display device 1 after the marker having higher priority is overwritten.</p> |
