点群目标空间分布主方向定量描述模型  

A quantitative description model of main direction of point cluster target spatial distribution

作　　者：李静 禄小敏 刘文蕊 李驿言 LI Jing;LU Xiaomin;LIU Wenrui;LI Yiyan(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]地理国情监测技术应用国家地方联合工程研究中心,兰州730070 [3]甘肃省地理国情监测工程实验室,兰州730070

出　　处：《测绘工程》2023年第6期23-28,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(42161066,41801395,41930101)。

摘　　要：目前点群目标空间分布主方向模型较少顾及分布密度对点群分布主方向判断的影响,针对此问题,提出一种点群目标空间分布主方向定量描述模型。基于点群的分布密度构建方向玫瑰图;利用统计加权算法,计算点群主方向,引入置信区间,得到点群的主方向分布范围。实验结果表明,文中模型较好地反映了分布密度对点群目标空间分布主方向的影响,计算结果与人类认知具有较高的一致性。The existing the main direction models of point cluster target spatial distribution seldom consider the influence of distribution density on the judgment of the spatial distribution main direction of point cluster target.To solve this problem,a quantitative description model of main direction of point cluster target spatial distribution is proposed.Firstly,the directional rose is constructed based on the distribution density of point cluster.Secondly,the main direction of the point cluster is calculated by using the statistical weighting algorithm.Finally,the confidence interval is introduced to calculate the distribution range of the main direction of the point cluster.The experimental results show that the model in this paper can better reflect the influence of distribution density on the main direction of point cluster target spatial distribution,and the calculation results are consistent with human cognition.

关 键 词：点群目标 主方向 方向玫瑰图 统计加权法 定量描述模型 

分 类 号：P208[天文地球—地图制图学与地理信息工程]