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Massive Detailed 3D Geographic Information Collection on the Web

Detailed three-dimensional (3D) geographic data are important for many kinds of spatial analysis and applications. However, professional Computer Aided Design (CAD) tools are essential to construct 3D models when collecting these data. As a result, the collection is limited to computers and professional persons in both commercial projects and Volunteered Geographic Information (VGI) projects. This paper presents a new system for detailed 3D geographic information collection through VGI. The system combines Web3D Geographic Information System (Web3DGIS) and a template based CAD methodology on the web. Based on Extensible 3D (X3D) and X3DOM, it is applicable for both computers and mobile devices and extends the collection to a large number of non-professional VGI contributors. With a methodology to transform the collected data into international standard CityGML format, massive detailed 3D geographic information collection will be achieved.