In the model, node height difference is combined with direction lane to express the real non-planar road networks and a way of its implementation is discussed.
将平面路网数据模型与节点高差以及方向车道结合，提出一种基于非平面的路网数据模型，用以表达实际的非平面路网。
In the model, node height difference is combined with direction lane to express the real non-planar road networks and a way of its implementation is discussed.
将平面路网数据模型与节点高差以及方向车道结合，提出一种基于非平面的路网数据模型，用以表达实际的非平面路网。
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