利用机载LiDAR和建筑物数据进行天际线提取与分析  

Skyline extraction and analysis using airborne LiDAR and building data

作　　者：刘艳霞 刘骁 白洁 郑凤姣 李显巨[2] LIU Yanxia;LIU Xiao;BAI Jie;ZHENG Fengjiao;LI Xianju(Wuhan Institute of Surveying and Mapping,Wuhan 430022,China;China University of Geosciences,Wuhan 430074,China)

机构地区：[1]武汉市测绘研究院,湖北武汉430022 [2]中国地质大学(武汉),湖北武汉430074

出　　处：《测绘通报》2024年第9期19-22,27,共5页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金面上项目(42071430);2021年基础测绘项目武汉市全市域机载激光扫描(HBT-12210177-214649)。

摘　　要：天际线作为城市立体风貌的重要表现形式,对其提取及定量分析对于城市规划与管理具有重要意义。本文基于机载LiDAR点云和建筑物矢量数据,提取了武汉市长江右岸沿江部分区域天际线,并选取轮廓形态、建筑物高度变化程度、轮廓平均转折点数3个指标,对天际线结果进行了定量评价与分析。结果显示,两者的提取结果均较符合实际地物地貌分布特征,长江右岸开发建设较为集中,高层建筑已有一定规模,整体高度较高,初步形成了城市剪影临水而立的滨水城市天际线。依据天际线结果,按照高度划分多个地块段,根据高度平均值及互差值与《武汉市建筑管理审批指导意见》中相关指标要求进行比较分析,除个别地块段外,均符合要求。As an important manifestation of 3D urban landscape,the extraction and quantitative evaluation analysis of skylines are of great significance for urban planning and management.This article is based on airborne laser LiDAR point cloud and building vector data to extract the skyline of some areas along the right bank of the Yangtze River in Wuhan.Three indicators,including contour shape,degree of building height change,and average number of contour turning points,are selected to quantitatively evaluate and analyze the skyline results.The results show that both extraction results are in good agreement with the actual distribution characteristics of land features and landforms.The development and construction on the right bank of the Yangtze River are relatively concentrated,and high-rise buildings have a certain scale and overall height,forming a preliminary waterfront urban skyline with urban silhouettes standing by the water.According to the consequences of skyline,it is divided into multiple block segments according to height,and compared and analyzed based on the average height and mutual difference with the relevant indicator requirements in the Wuhan City Building Management Approval Guidelines,except for a few plot segments,all others meet the requirements.

关 键 词：LIDAR 建筑物 天际线 定量评价 

分 类 号：P237[天文地球—摄影测量与遥感]