Three-dimensional microscopic highway network generation method capable of realizing real-time interaction

Abstract

The invention discloses a three-dimensional microscopic highway network generation method capable of realizing real-time interaction. The method mainly comprises a front-end interaction part and a frame part. A principle of the frame is a directed graph formed by combining nodes, road sections and lanes, and a node part represents endpoints of roads and has a function of processing road joints andintersections; a road section part is a Bezier curve defined between the two nodes so as to control an overall shape of the lane under the road section; and the lanes are divided into two types, onetype is the lane used for connecting the two road sections in the nodes, and the other type is the lane used for connecting the two nodes in the road sections. In the method, a relatively accurate road network automatically generates a framework; and with the help of a related real-time development platform, a geometrical shape of a road network can be clearly represented, development or planningpersonnel can conveniently and quickly establish and adjust attributes such as a shape and a position of the road, the number and direction of the lanes and the like, and traffic logic of the intersection can be automatically generated according to a road connection condition 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. It leads to a large conversion error between the monitored visual information and structured data; second, 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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