顾及用户体验的三维城市模型自适应组织方法

An Adaptive Organization Method for Complex 3D City Models Considering User Experience

传统基于'图层-对象'的组织方法,没有考虑三维城市模型的不同内容以及不同细节层次的粒度差异,导致在网络环境下的传输效率低,难以满足多用户并发访问的流畅可视化。深入分析了大范围漫游与小范围聚焦的用户体验特点,通过元数据统筹管理和对象离散化,即时响应用户请求,减少无效数据传输,保证了多用户并发环境下的高效调度和浏览。针对模型LoD和分解的对象,设计了结构统一的对象ID,隐式存储关联关系并支持分布式模型存储管理。以分布式数据库MongoDB为平台进行实验,验证了本文方法的可行性和有效性。

The traditional method for visualization of 3D city models based on a ＂Layer-Object＂ does not consider the granularity differences in different data type and in different levels of detail, which results in the low transmission efficiency in the network environment and does not satisfy the need for smooth visualization with multi-user concurrent accesses. This paper analyzes the characteristics of an user experience including roaming over a wide range and focusing on small range, and proposes a method of using an index metadata to coordinate the organization and scheduling of model objects, which delivers instant responses to user requests, and at the same time, by decomposing model ob- jects, decreases invalid data transmission. This paper describes the design of unified object ID struc- ture to implicitly store the relationships of LoD models and decomposed objects to support distributed management. Finally, the validity and feasibility of this method are demonstrated through experi- ments on the platform of a distributed database MongoDB.