一种大场景Web三维注记可视化技术

针对目前大场景Web三维电子地图侧重模型展示、轻海量三维注记展示，不能很好地为用户提供地图语义信息的问题，本文提出了一种面向大场景Web三维的注记可视化技术，较好地实现了海量注记在三维电子地图上的立体、逐层级展示，为三维电子地图增加了明确的语义指引。基于浙江省新型基础测绘成果的三维展示试验结果表明，所提技术能够便捷地构建三维注记LOD模型，提供三维电子地图注记服务，提升三维电子地图注记效率，其研究成果可应用于天地图、自然资源空间基础信息平台、不动产登记平台等领域。

A Web 3D annotation display technique in large scenes

Lots of researches on Web 3D digital maps pay more attention to 3D model displaying and despise 3D annotation displaying, which can not provide map semantic information properly to consumers. A Web 3D annotation display technique in the large scenes is put forward to achieve tridimensional exhibition of large amounts annotations in 3D digital maps and provide explicit semantic guidance. 3D display experiment on Zhejiang new fundamental surveying and mapping products shows that, the technique can build 3D annotation LOD model conveniently and provide 3D annotation services and increase annotation efficiency. This technology can be applied to areas such as Tianditu, natural resources spatial basic information platform and real estate registration platform.