Prototype Implementations for Multi-typed 3D Urban Features Visualization on Mobile 3D and Web 3D Environments
نویسندگان
چکیده
SUMMARY This study aims at urban 3D features modeling/rendering system architecture design and its prototype implementations on 3D mobile and web 3D application. Mobile 3D is a cutting-edge technology. However, platforms and devices for mobile 3D GIS technology manipulating geographic data and information provide some limitations to design and implement. Despite, emerging standard mobile 3D graphic rendering stimulates mobile 3D GIS and 3D cartographic services on hand-held devices. Core functions of mobile 3D GIS by feature-based approach was designed as some modules: data model and design of spatial features, editing and manipulating of 3D urban features, generating of geometrically complex type features, supporting of both database and file system, handling of attributes for 3D features, texture mapping of complex types of 3D objects and digital elevation model. With these functions, an integrated urban 3D modeling and rendering system was implemented using standard mobile 3D graphic API. As well as this work for mobile 3D design and implementation, multiple types of geographic features encoded by GML (Geography Markup Language) for the XML-databases building are taken into account of practical applicability for 3D urban modeling approaches. For this process, it was carried out to implement GML-processing software with the main functions: supporting and customizing map style sheet, attribute editing, manipulating geo-base features, web publishing, importing/exporting ESRI-shape file and data transferring to X3D for 3D complex features. It is thought that functions handling X3D from GML or XML database can be used as major components within web-based geospatial data services supporting complex types of transportation application data model. These implementations such as mobile 3D and web 3D can be easily extended to practical needs for data communication and sharing of multiple and complex typed urban features on an integrated architecture.
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