为了探究Vector 3D Tiles格式在三维矢量地物表达方面的效果和性能,研究了一套Vector 3D Tiles格式生产和表达工具,用于在Cesium平台上对矢量数据进行可视化展示.主要工作包括两部分:一是将数据从传统的矢量格式转换为Vector 3D Tiles格式,二是在Cesium平台上展示转换后的Vector 3D Tiles数据.为了验证方法可行性,采用广州市地下管线数据开展了实验,对Shapefile、GeoJSON二维矢量格式进行处理,生成Vector 3D Tiles格式后,在Cesi-um平台上进行三维可视化展示.通过不同格式数据的加载效率和呈现效果比较,证明了矢量切片数据比原始矢量格式加载更快、渲染更平滑.在此基础上,对矢量切片数据基于自定义三维样式的渲染能力进行了验证.
Research of 3D Vector Data Visualization Based on Vector 3D Tiles Format
Vector 3D Tiles format is explored and implemented in this paper to visualize vector data on Cesium-based 3D-GIS platform.Two parts of work has been done.The first part is to create Vector 3D Tiles from traditional vector format,while the second part is to visualize the Vector 3D Tiles on Cesium-based 3D-GIS platform.Besides,user-defined style is extended in the two sides to support 3D style render-ing.To verify the feasibility of the proposed method,an experiment is designed to visualize massive underground pipelines.The pipelines given in traditional vector format are processed to generate Vector 3D Tiles,and visualized in Cesium-based 3D-GIS platform.It proves that vector tile data is much faster to load and smoother to render than original vector format in all scenarios of data volume.Besides,the vector tile data is also verified to have the capability to be rendered in user-defined 3D style.Different to the complex process of batched or instanced 3D Tiles generation,it has the potential of faster data generation and more flexible visualization in Cesium-based 3D-GIS platform.
Vector tile data3D-GISCesium3D Tilesunderground pipeline visualizationVector data visualization
万方数据
维普
