Abstract: High precision map provides many lane level map elements beyond the sensing range for autonomous driving positioning, perception, planning and control modules, It is an indispensable part of L3 and above autonomous driving. High precision map has high precision and large data volume, but the computing power of the autonomous driving vehicle is limited, so it cannot be separated from the rapid analysis and dynamic extraction of the elements by the high precision map data engine. A high precision map data engine model for autonomous driving is proposed. Through the transformation of high precision map data, element acquisition, map matching, road network construction, data broadcasting, on-board Ethernet transmission, road network reconstruction and application adaptation, the static and dynamic element information required by autonomous driving can be continuously and efficiently provided to meet the real-time demand of high precision map during driving.

Key words: high precision map, data engine, model, autonomous driving, electronic horizon provider, data reconstruction module