基于WebGL的三维WebGIS场景实现

Implementation of WebGL-based 3D WebGIS scene

寻求一种不需要组件加载来实现三维WebGIS场景的解决方案,对突破目前三维WebGIS缺乏高效前端显示技术的瓶颈具有重要意义。将WebGL作为图形引擎,采用真实空间数据作为验证和测试数据,使用JavaScript编写一套较完整的三维WebGIS场景及图层元素类库,设计简单的数据服务,形成一个简单的GIS系统。实验验证了WebGL是一种可行有效的实现零组件三维WebGIS场景构建的技术手段。

Finding a solution to realize the rendering of the three-dimensional WebGIS scene with none plug-in has great signifi-cance in breaking through the bottleneck of the three-dimensional WebGIS front-end graphic technology .A more complete class library for the three-dimensional scene and layer items of the GIS was programmed by taking the WebGL as the graphics engine . A series of services were designed to meet the needs on reading space data and a simple geographic information system was formed at last .The test using real space data as check and test data proves that WebGL is a feasible and effective technology in building the three-dimensional WebGIS scene with none plug-in .