基于CityGML的三维模型转换与可视化研究

The Conversion and Visualization of 3D Model Based on CityGML

三维数据是三维GIS的核心,传统的三维模型在数据存储结构和描述地理信息方面上无统一的标准,且制作成本较高。CityGML的出现大大促进了三维模型共享和互操作。文章首先分析了CityGML模型的格式与特点;比较且总结了现有的三维模型转换软件;探讨了CityGML在浏览器中无插件可视化的方法。最后通过将SKP格式的模型转至CityGML,再转换为X3D文件并显示在支持HTML5的浏览器中来验证本文的研究。文章可以为相关的数据生产部门和研究者提供一定的参考。

Three-dimensional data is the core of three-dimensional GIS,traditional three-dimensional model have no uniform standards on data structure and description of geographic information ,and its production cost is huge .The e-mergence of CityGML model greatly promoted the sharing and interoperability of three-dimensional models .This paper firstly analyzed the format and the characteristics of CityGML ,then,evaluated the existing 3D model conversion tools;sec-ondly,the CityGML model visualization approaches in the browser were summarized and compared;finally,an application that transformed the SKP format model into CityGML and then converted to X 3 D for visualization in the browser which supports HTML5 standard was given.This work can provide some reference for the 3D data production department and related researchers .