Research on the construction method of urban road network model based on graph grammar
The construction of a Digital-Mirror that matches the real world provides strong support for urban visualization op-erations and scientific decision-making.To construct the traffic network model in virtual city scenery,the model meta-structure of node and road segment and the basic road network topology samples are designed.Based on the graph grammar,the generation rules of the network model formed by nodes and sections are studied,and the virtual network model with high consistency with the actual environment is generated iteratively.The reuse of generation rules and the storage of generation results both improve the out-put efficiency of the model.Assigning road restrictions and constraints related to the real environment to meta nodes in virtual mod-els enhances the application value of digital road network models and integrates data foundation for the development of digital cit-ies towards digital intelligence.
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