Electronic display system

摘要

In an electronic map display system, predetermined linear display object data of all map data are stored in a first memory according to a predetermined coordinate system. Target point data other than the predetermined linear display object data are stored in a second memory in accordance with a relative coordinate system based on the predetermined linear objects. The data of the first memory are converted into display data of designated magnification rate by a first converter. The target point data of the second memory are converted into display data in accordance with a coordinate system based on the linear display objects by a second converter. A display signal is produced to display a map image in accordance with the data converted by the first and second data converters.