| 摘要: |
| 受船载仪器、海况等要素限制, 传统水深测量中浅水区域无法对浅海水深进行测量。为克服此困难, 利用近年来新兴的机载激光测深系统(light detection and ranging system, 简称LiDAR)进行浅海水深测量, 用LiDAR获取的点云数据进行处理后得到的水下地形等深线与海图图载水深进行直观对比,同一坐标点下的点云水深与截图水深进行定量分析。结果表明, LiDAR获取的水深精度高, 水深点密集,可更快获得浅海区域详细的高精度的水下地形。这些优点使其在近岸浅海海岸防护、围海造田、港口建设等海洋工程项目中应用前景广阔。此外目前国内LiDAR技术主要用于陆地, 应用于浅海水深测绘还很少, 本研究对机载LiDAR进行水深测量的研究进行了补充。 |
| 关键词: 机载激光测深 浅海水深测绘 点云数据处理 |
| DOI：10.11759/hykx20160906001 |
| 分类号: |
| 基金项目:上海市科委基于国产高分辨率卫星的海洋测绘关键技术研究(14590502200) |
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| Analysis of shallow-sea bathymatric mapping based on airborne LiDAR |
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WANG Lin-zhen,CAO Bin-cai,LUAN Kui-feng,ZHANG Xiang,SHEN Wei
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| Abstract: |
| Current bathymetry techniques are mainly dominated by onboard multibeam and single-beam technologies. But for shallow bathymetry, these methods cannot operate normally due to instrument and sea condition limitations. Today, modern light detection and ranging (LiDAR) remote sensing can overcome these limitations to facilitate quicker and more precise sea data collection. The big advantage of LiDAR in surveying and mapping is its blue and green bands of permeability for measuring depth. In China, LiDAR is primarily used on land and less so for sea bathymetry and topographic maps. In this paper, we demonstrate the applicability of LiDAR for bathymetry measurement. We introduce the principle of airborne laser bathymetry and extract contours using LiDAR. By comparing the relative and absolute accuracies of sea charts and cloud point contours, we confirm that the precision of LiDAR is high and that it has broad application prospects. |
| Key words: airborne LiDAR bathymetry shallow-sea bathymatric mapping point clouds data processing |
