基于多源激光点云数据的大型互通式立交桥及道路实景建模  

Modeling of large-scale interchanges and roads based on multi-source laser point cloud data

作　　者：王甜甜 张彦 田雨农 石增宇 WANG Tiantian;ZHANG Yan;TIAN Yunong;SHI Zengyu(Beijing Institute of Surveying and Mapping,Beijing 100038,China;Beijing Key Laboratory of Urban Spatial Information Engineering,Beijing 100038,China)

机构地区：[1]北京市测绘设计研究院,北京100038 [2]城市空间信息工程北京市重点实验室,北京100038

出　　处：《北京测绘》2023年第1期37-42,共6页Beijing Surveying and Mapping

基　　金：北京市科技计划(D171100007417003)。

摘　　要：大型立交桥的三维实景模型是数字城市建设的重要内容之一,可以为桥下空间梳理提供所需的实景三维参考数据。本文从实际生产应用的角度出发,针对三维模型生产周期长、点云采集工作量大且易存在数据“空洞”等问题,研究了基于多源三维激光点云数据进行大型互通式立交桥三维建模的方法,并得出了可行的数据采集和三维建模方案。以天宁寺桥为试验对象,利用车载、背包以及手持三维激光扫描系统采集高精度、高密度的三维点云数据,同时利用EPS实现半自动化立交桥结构线采集,参考点云数据基于3D Max平台实现对立交桥、河道及附属设施的三维建模,证明了利用多源点云数据进行大型互通式立交桥建模的可行性和有效性。The three-dimensional(3D) reality model of a large overpass is one of the important contents of digital city construction, which can provide the necessary 3D reference data for the space under the bridge. From the perspective of actual production application, in view of the long production cycle of 3D models, the large workload of point cloud collection and the easy existence of data "holes", this paper studied the 3D modeling method of large-scale interchange based on multi-source 3D laser point cloud data, and obtained a feasible data acquisition and 3D modeling scheme. Taking Tianningsi Bridge as the test object, high-precision and high-density 3D point cloud data were collected by vehicle, backpack and handheld 3D laser scanning systems, and the 3D structure line collection of semi-automatic was realized by EPS. Based on the 3D Max platform, the 3D modeling of opposing interchanges, river channels and ancillary facilities was realized with point cloud data as reference, which proved the feasibility and effectiveness of using multi-source point cloud data for large-scale interchange overpass modeling.

关 键 词：车载激光雷达 背包激光雷达 手持激光雷达 互通式立交桥 半自动化三维建模 

分 类 号：P258[天文地球—测绘科学与技术]