基于cityGML的桥梁三维建模技术

Construction of Bridge 3D Model Based on cityGML

cityGML是三维城市建模的通用模型,是一种三维数据存储与转换的标准格式。cityGML能够解决普通桥梁三维建模中数据格式不统一所导致的数据无法共用,数据冗余占用存储空间等问题,并在需要时可以向其他格式转化作进一步应用。本文以一个模拟桥梁为例,按照cityGML标准对桥梁进行三维建模,采用实测桥梁数据生成dwg格式文件并向cityGML格式进行转换的方法。之后介绍cityGML通用桥梁模型向其他格式进行转换,验证其通用模型向多格式模型转化的简便性与可能性。

eityGML is a universal form for 3D city model. It is a standard format for 3D data storage and transformation, cityGML could solve the problem that data could not be shared due to the different kinds of data formats from normal bridge modeling, so that to release the meaningless data storage of data redundancy. For further application , universal cityGML model could be transformed into special format. In this article, a simulated bridge was taken as example to build cityGML bridge model. Man can measure bridge data and build dwg file from autoCAD, then transform it to cityGML. After that, there is a brief introduction of transforming cityGML model into other formats, to prove the simpleness and possibility of using universal eityGML model.