| 摘要 |
<p>PURPOSE:To enable the uniformization of output video information, by selecting memories into which map informations corresponding to a range are respectively entered. CONSTITUTION:A corresponding memories 5-7, into which map informations are entered as data quantities inversely proportional to a display range, are selected by a memory selection circuit 4 responding to a range change-over signal. Then, the memories 5-7 selected through an azimuth address counter 1 and a range address counter 3 are accessed to output uniform video information regardless of a range and it is prevented that the thickness of the line showing a display map is changed by the range like a case using one map film and map display easy to observe is always performed.</p> |
