摘要
机载全波形激光雷达(LiDAR)数据的提取是其后续分析和处理的首要工作,为快速提取机载全波形LiDAR文件数据,本文以研究区内采集的Leica ALS60激光雷达系统记录的LAS1.3格式全波形文件数据为研究对象,以IDL8.3为编程开发平台,在对LAS1.3全波形文件格式解析的基础上,分析机载全波形LiDAR文件的数据结构与数据组织,判断出全波形文件中记录的全波形数据和点数据各自的存储位置,然后应用内存映射文件方法,映射出全波形文件数据在内存中的映射标识,进而得到文件映射内核对象,之后结合Leica ALS60 LAS1.3全波形文件的主要字段参数值与全波形文件数据提取顺序流程,结果表明本研究方法适合于LAS1.3二进制全波形大文件数据的读取且效率很高,完成其全波形文件中波形数据的快速提取研究与可视化显示,为全波形数据的波形分解和应用工作奠定基础。
Full - waveform extraction airborne light detection and ranging （LiDAR） priority data is processed and its subsequent analysis, in order to quickly extract airborne LiDAR full - waveform data file, LAS1. 3 paper study area acquired Leica ALS60 record-ing laser radar system full waveform data file format research data to IDL8. 3 programming development platform, based on the full - wave file format parsing LAS1. 3 analyzed on - board data structure and organize the full waveform LiDAR data file, determines the full waveform File records in the full waveform data and point data storage location, and then apply the memory mapping file method, map-ping the full waveform file data in memory mapping logo, and then get the file mapping kernel object, followed by Leica ALS60 LAS1. 3 the main field of document parameters with the waveform data of full waveform file extraction process sequence, study results show that the method is suitable for large full waveform LAS1. 3 binary file data reading and high efficiency, rapid completion of its full -wave waveform data file extraction and visual display, the waveform decomposition and lay - yl application work full waveform data.
作者
姚松涛
邢艳秋
李梦颖
闫灿
Yao Songtao Xing Yanqiu Li Mengying Yan Can(Center for Forest Operation and Environment, Northeast Forestry University, Harbin, Heilongjiang, 150040, China)
出处
《森林工程》
2017年第3期64-68,73,共6页
Forest Engineering
基金
林业公益性行业科研专项(201504319)
国家重点基础研究发展计划项目(2013CB733404)
