“城市引擎”规则建模在城市规划中的作用与特点

Functions and Characteristics of City Engine and Its Rule-based Modeling in Urban Planning

"城市引擎"规则建模可以快速生成大量的模型,在城市规划领域有很大的应用潜力,但目前国内外对其研究较少。本文从城市规划角度出发,在已有研究基础和实践案例上,对规则建模的优势、模型精细程度、建模步骤和如何辅助城市规划做了研究。在城市规划应用方面提出规则建模主要有数据准备与处理,城市建设要素类型分类,规则编写与赋予,模型生成和深化四个步骤。基于其建模精度,适宜应用的规划层次是总体规划、控制性详细规划。其在城市规划的辅助作用主要体现在三维模型空间展现、数据输出和分析、辅助规划管理和提供公共参与平台,以及与其他软件结合辅助规划方案设计和管理。

City Engine （CE） can efficiently generate 3D city models by rule- based modeling and has great potential in supporting urban planning and design. Nowadays there is still lack of research about City Engine in the urban planning field. From the viewpoint of urban planning, this study analyzes advantages of rule-based modeling, model accuracy and modeling steps based on previous studies and planning projects. From the above analysis, the present paper describes how to support urban planning and design. For the application of CE-based models to urban planning, the following four major steps are proposed in the paper： （1） data preparation and processing; （2） classification of urban construction elements; （3） generating and assigning rules; （4） model generation and modification. Under consideration of model accuracy, CE models are suitable for supporting the master planning and the regulatory detailed planning design. In urban planning, CE could play the following supporting roles： 3D visualization of urban space; data output for urban environment analysis, assessment and management; and providing a communication platform for public participation. It would also be combined with other application softwares for supporting urban planning and