粒子系统支持下地形流模式表达研究  

The research of terrain flow-model representation based on particle system

作　　者：刘鹏程[1,2] 黄欣[1,2] 郭明武 LIU Pengcheng;HUANG Xin;GUO Mingwu(Key Laboratory for Geographical Process Analysis & Simulation,Hubei Province, Wuhan 430079, China;College of Urban and Environmental Science,Central China Normal University, Wuhan 430079, China;Wuhan Geometic Institute,Wuhan 430022)

机构地区：[1]华中师范大学地理过程分析与模拟湖北省重点实验室,武汉430079 [2]华中师范大学城市与环境科学学院,武汉430079 [3]武汉市测绘研究院,武汉430022

出　　处：《华中师范大学学报（自然科学版）》2022年第3期445-453,共9页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金项目(42071455);数字制图与国土信息应用工程自然资源部重点实验室开放研究基金(ZRZYBWD201909).

摘　　要：该文提出一种基于粒子系统的地形起伏动态可视化表达方法.首先利用D8算法并结合坡度等信息构建水流模型,基于DEM数据生成水流场数据;使用空间随机均匀和重要特征位置相结合的方法布设粒子,在粒子系统的支持下模拟高低起伏的地形水流场景,从而间接地实现DEM动态多尺度的可视化.以武汉市的DEM数据为例进行实验,结果表明该方法模拟得到的粒子流效果能真实反映其地形特征,该研究为DEM数据提供了新的表达方法.A method for visualizing the dynamic representation of terrain undulation based on particle systems is proposed.Firstly,the flow field data is constructed using a D8 algorithm and combined with the slope and other information based on the DEM data.The particles are deployed using a combination of spatial random uniformity and important feature positions,and the particle flow scene in the undulating terrain is simulated under the support of the particle system,thus indirectly realizing the DEM dynamic multi-scale visualization.The DEM data of Wuhan City is used to conduct experiments,and the particle flow effect simulated by this method is ablre to truly reflect the terrain characteristics.This study provides a new method for the representation of DEM data.

关 键 词：粒子系统 DEM 流模式 动态可视化 

分 类 号：P208[天文地球—地图制图学与地理信息工程]