Estimation of LAI with the LiDAR Technology: A Review
文献类型：期刊论文
| 作者 | Wang, Yao1,2; Fang, Hongliang1,2 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 12期号:20页码:28 |
| 关键词 | leaf area index (LAI) vertical foliage profile (VFP) terrestrial laser scanning (TLS) airborne laser scanning (ALS) spaceborne laser scanning (SLS) |
| DOI | 10.3390/rs12203457 |
| 通讯作者 | Wang, Yao(wangy.18b@igsnrr.ac.cn) |
| 英文摘要 | Leaf area index (LAI) is an important vegetation parameter. Active light detection and ranging (LiDAR) technology has been widely used to estimate vegetation LAI. In this study, LiDAR technology, LAI retrieval and validation methods, and impact factors are reviewed. First, the paper introduces types of LiDAR systems and LiDAR data preprocessing methods. After introducing the application of different LiDAR systems, LAI retrieval methods are described. Subsequently, the review discusses various LiDAR LAI validation schemes and limitations in LiDAR LAI validation. Finally, factors affecting LAI estimation are analyzed. The review presents that LAI is mainly estimated from LiDAR data by means of the correlation with the gap fraction and contact frequency, and also from the regression of forest biophysical parameters derived from LiDAR. Terrestrial laser scanning (TLS) can be used to effectively estimate the LAI and vertical foliage profile (VFP) within plots, but this method is affected by clumping, occlusion, voxel size, and woody material. Airborne laser scanning (ALS) covers relatively large areas in a spatially contiguous manner. However, the capability of describing the within-canopy structure is limited, and the accuracy of LAI estimation with ALS is affected by the height threshold and sampling size, and types of return. Spaceborne laser scanning (SLS) provides the global LAI and VFP, and the accuracy of estimation is affected by the footprint size and topography. The use of LiDAR instruments for the retrieval of the LAI and VFP has increased; however, current LiDAR LAI validation studies are mostly performed at local scales. Future research should explore new methods to invert LAI and VFP from LiDAR and enhance the quantitative analysis and large-scale validation of the parameters. |
| WOS关键词 | LEAF-AREA INDEX ; WAVE-FORM LIDAR ; CANOPY GAP FRACTION ; LASER-SCANNING DATA ; VERTICAL FOLIAGE PROFILE ; AIRBORNE LIDAR ; TERRESTRIAL LIDAR ; NATIONAL FOREST ; BIOPHYSICAL PROPERTIES ; VEGETATION STRUCTURE |
| 资助项目 | National Key Research and Development Program of China[2016YFA0600201] |
| WOS研究方向 | Remote Sensing |
| 语种 | 英语 |
| WOS记录号 | WOS:000583014600001 |
| 出版者 | MDPI |
| 资助机构 | National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156781]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Yao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, LREIS, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yao,Fang, Hongliang. Estimation of LAI with the LiDAR Technology: A Review[J]. REMOTE SENSING,2020,12(20):28. |
| APA | Wang, Yao,&Fang, Hongliang.(2020).Estimation of LAI with the LiDAR Technology: A Review.REMOTE SENSING,12(20),28. |
| MLA | Wang, Yao,et al."Estimation of LAI with the LiDAR Technology: A Review".REMOTE SENSING 12.20(2020):28. |
入库方式： OAI收割
来源：地理科学与资源研究所
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