A Real-time Interactive 3D Microscopic Road Network Generation Method

Abstract

The invention discloses a real-time interactive three-dimensional microscopic road network generation method, which mainly includes a front-end interactive part and a frame part. The principle of the frame is a directed graph formed by combining nodes, road sections and lanes, and the node part represents the endpoint of the road , has the processing function of road junctions and intersections; the section part is a Bezier curve defined between two nodes to control the overall shape of the lane under the section; the lane is divided into two types, one is in the node The lane used to connect two road sections, and the second is the lane used to connect two nodes in the road section. The present invention is a relatively accurate road network automatic generation framework. With the help of the relevant real-time development platform, the geometric shape of the road network can be clearly expressed, which is convenient for developers or planners to quickly establish and adjust attributes such as road shape and position, number of lanes and directions, etc., and The traffic logic of the intersection can be automatically generated according to the road connection situation at the node.

Description

technical field [0001] The invention relates to the field of urban traffic operation and maintenance, in particular to a method for generating a three-dimensional microscopic road network capable of real-time interaction. Background technique [0002] With the continuous advancement of the urbanization process, the difficulty of traffic management has become increasingly prominent, and the concept of traffic operation and maintenance has emerged as the times require. The traffic operation and maintenance system is an important reference for urban traffic planning and scientific management. Traffic operation and maintenance is a technology that tracks and describes changes in traffic movement in the space-time dimension and is used to guide urban traffic planning. According to the granularity of its attention, it can be roughly divided into two levels: macro and micro. Macro-traffic operation and maintenance is mainly based on traffic carrying capacity to study more reasonab...

AI Technical Summary

Problems solved by technology

[0003] In the field of traffic operation and maintenance, the existing road network generation methods generally have the following shortcomings: the geometric shape of the road is a straight line segment of a two-dimensional plane, and polylines are used to fit curved roads, and there is no method for generating curves

Although this can quickly establish traffic semantics and reduce the amount of calculation, the shortcomings of this strategy are also obvious. First, the accuracy of geometric calculation is sacrificed. The conversion error between the monitored visual information and structured data is relatively large; the second is that for road modules with height changes (such as overpasses and tunnels), the representation is not intuitive enough

In order to adapt to the generation mode with the line segment as the basic unit, once the road network is established, the fine-tuning of the shape and position will become cumbersome; in addition, the visual operation and running effect are mostly presented in two-dimensional space, which is not enough for users Intuitive, difficult to get started

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