基于机载激光雷达的三维景观模拟设计系统研究

Research on 3D landscape simulation design system based on Airborne Lidar

为了提升三维景观逼近度,优化三维景观展示效果,提出了基于机载激光雷达的三维景观模拟设计系统,系统包括景观数据采集与管理模块、模型景观设计模块以及三维景观展示模块,其中景观数据采集与管理模块利用机载激光雷达采集并处理三维景观基础数据;模型景观设计模块利用该数据,使用规则格网法实现地形模拟与设计,利用基于改进细节层次LOD算法完成三维景观渲染;通过三维景观展示模块显示三维景观设计效果。实验结果表明:该系统所模拟设计的农田地形与真实农田地形逼近度高,平均逼近度高达98%。所设计的三维景观效果清晰,可详细展示真实景观。

The 3D landscape simulation design system based on airborne lidar is studied to improve the approximation degree of 3D landscape and optimise the display effect of 3D landscape. The system includes a landscape data acquisition and management module,model landscape design module and three-dimensional landscape display module.The landscape data acquisition and management module use airborne lidar to collect and process 3D landscape primary data;the model landscape design module uses the data to realise terrain simulation and design by regular grid method and completes by using LOD algorithm based on improved level of detailed Three-dimensional landscape rendering;through the three-dimensional landscape,display module to display the three-dimensional landscape design effect.The experimental results show that: the simulation design of farmland terrain and accurate farmland terrain approximation is high,the average approximation degree is as high as 98%. The design of the three-dimensional landscape effect is straightforward,can show the actual landscape in detail.