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Remote Sensing for Land & Resources    2020, Vol. 32 Issue (1) : 184-190     DOI: 10.6046/gtzyyg.2020.01.25
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Potential evaluation of China’s coastal airborne LiDAR bathymetry based on CZMIL Nova
Qi LI1,2, Jianchao WANG1, Yachao HAN1, Zihong GAO1, Yongjun ZHANG1, Dingjian JIN1
1. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China
2. Key Laboratory of Airborne Geophysics and Remote Sensing Geology, Ministry of Natural Resources, Beijing 100083, China
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Abstract  

Water transparency is the key factor of airborne LiDAR bathymetry. Turbid waters produce noise in LiDAR echo signal and weaken the laser pulse or cause a gap. Therefore, it is necessary to study water optical properties. Using MODIS Kd (490 nm) and general bathymetric chart of the oceans (GEBCO) bathymetric data, the authors calculated the maximum detectable depth in China’s coastal area based on CZMIL Nova, and classified the result into 3 types. CZMIL test data from different areas were used to verify the accuracy of the classification. The results show that a total of 211,900 km 2 sea area is suitable for the performance of bathymetric survey with airborne LiDAR. The coastal area of Wenchang to Dongfang of Hainan, Beihai and the east and west of Leizhou peninsula, Rizhao to Qindao of Shangdong and Yinzhou to Suizhong of Liaodong Bay are suitable for the performance of land and sea integrating topographic survey, with the maximum measurable depths estimated by Kd being 20~40 m, 10~20 m, 20~25 m, 10~15 m, respectively.

Keywords airborne LiDAR      Kd      CZMIL Nova      potential area     
:  TP79  
Issue Date: 14 March 2020
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Qi LI
Jianchao WANG
Yachao HAN
Zihong GAO
Yongjun ZHANG
Dingjian JIN
Cite this article:   
Qi LI,Jianchao WANG,Yachao HAN, et al. Potential evaluation of China’s coastal airborne LiDAR bathymetry based on CZMIL Nova[J]. Remote Sensing for Land & Resources, 2020, 32(1): 184-190.
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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2020.01.25     OR     https://www.gtzyyg.com/EN/Y2020/V32/I1/184
Fig.1  Airborne LiDAR bathymetry system
Fig.2  Integration testing of the new generation CZMIL Nova system
Fig.3  Inversion result of Kd (490 nm) using MODIS data
Fig.4  Flowchart of ratio calculation
Fig.5  Classification of potential detection depth in partial sea of China
Fig.6  Location of CZMIL Nova test data
实验区 地理坐标 测深潜
力分类		 参考Kd/
m-1		 数据获取时间
三亚市蜈支洲岛 N18.32°,E109.77° 一类区 <0.2 2018年4月
北海市涠洲岛 N21.45°,E109.43° 二类、三类区 [0.2,0.8] 2018年11月
江门市赤溪镇 N21.92°,E113.32° 三类、四类区 >0.8 2018年8月
Tab.1  Location of test data
Fig.7  Typical elevation profile of test area
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