等高线约束的Delaunay三角网在土石方量计算中的应用  

Application of Contour-Line Constrained Delaunay Triangulation in Earthwork Calculation

作　　者：张蒙 王想红[2] 徐胜华[3] 肖冰 文化立 ZHANG Meng;WANG Xiang-hong;XU Sheng-hua;XIAO Bing;WEN Hua-li(School of Geomatics,Liaoning Technical University,Fuxin 123000;Development Research Center of China Geological Survey,Beijing 100037;Chinese Academy of Surveying and Mapping,Beijing 100830;Shandong Zhengheng Real Estate Appraisal and Survey Co.,Ltd,Jinan 250014,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国地质调查局发展研究中心,北京100037 [3]中国测绘科学研究院,北京100830 [4]山东正衡土地房地产评估勘测有限公司,山东济南250014

出　　处：《地理与地理信息科学》2020年第4期14-18,共5页Geography and Geo-Information Science

基　　金：国家重点研发计划项目(2016YFC0803108、2016YFC0803101)。

摘　　要：土石方量计算是工程建设的重要步骤,其计算精度是提高工程质量的首要问题。针对利用无约束不规则三角网计算土石方量时存在的计算精度问题,该文利用三维激光点云数据,根据约束Delaunay三角网的构建原理,探讨了基于等高线约束的Delaunay三角网方法在土石方量计算中的应用。首先,以土石方的等高线作为约束线,利用迭代算法对无约束不规则三角网进行剖分,构建等高线约束Delaunay三角网,并进行土石方量计算。然后,将计算结果与无约束不规则三角网、方格网法计算结果进行对比与误差分析,验证了该方法的计算精度,为基于三维点云数据的土石方量精确计算提供了参考。Calculating the earthwork volume is an important step in engineering construction.The calculation accuracy is the primary factor dictating the quality of the project.In order to address the issue of low accuracy in using unconstrained irregular triangulation to calculate the earthwork volume,we have explored the application of the contour-line constrained Delaunay triangulation method in the calculation of earthwork volume by using 3D laser point cloud data.This is based on the construction principle of constrained Delaunay triangulation network.To be more specific,this method is described as follows.First,the contour line of earthwork is used as the constraint line.Then the iterative algorithm is applied to realize the unconstrained irregular triangulation,and the contour line constrained Delaunay triangulation network is constructed.Finally,the calculation of the earthwork volume is carried out.In order to test the accuracy of the method in this paper,we have compared it with the unconstrained irregular triangulation network and the grid method.In addition,root mean square error analysis is performed.The higher calculation accuracy of this method is verified,which provides guidance for the accurate calculation of the earthwork volume based on 3D point cloud data.

关 键 词：点云数据 约束线 约束Delaunay三角网 土石方量计算 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TU751[天文地球—测绘科学与技术]