A preliminary study on land-sea integrated topographic surveying based on CZMIL bathymetric technique

doi:10.6046/zrzyyg.2021007

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Abstract

Conventional methods for regional bathymetry mainly use shipborne acoustic detection technologies. However, since the hull cannot access the coastal shallow waters and the areas with dense islands and coral reefs, there is no available data of near-coastal areas. These problems can be effectively solved with the emergence and development of airborne lidar bathymetric technology, which has become a fast and efficient method for water-depth and submarine topographic exploration. Based on the airborne laser sounder CZMIL Nova, this paper introduces the characteristics and influencing factors of the land-sea integrated technologic surveying and its preliminary application in the land-sea integrated topographic surveying of islands.

Keywords airborne laser bathymetry CZMIL remote sensing coastal zone topography

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TP79

Issue Date: 23 December 2021

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	Fang WU
	Dingjian JIN
	Zonggui ZHANG
	Xinyang JI
	Tianqi LI
	Yu GAO

Cite this article:

Fang WU,Dingjian JIN,Zonggui ZHANG, et al. A preliminary study on land-sea integrated topographic surveying based on CZMIL bathymetric technique[J]. Remote Sensing for Natural Resources, 2021, 33(4): 173-180.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2021007 OR https://www.gtzyyg.com/EN/Y2021/V33/I4/173

类别	技术指标	CZMIL Nova	Hawk Eye III	VQ-880G	LADS MK III
一般指标	工作航高/m	400 ~1 000	400 ~600	600 ~1 600	400 ~1 000
一般指标	飞行速度/kts	140 ~175	140 ~175	140 ~175	125 ~175
测量指标	激光扫描频率/kHz	水深70/10地形 80	水深35/10地形 500	550	512/1.5
	最大测深	水深70/10地形 80	水深35/10地形 500	1.5 secchi	标称3.0 secchi 最深可达80 m
		浅水2.0/ $K d$	浅水2.2/ $K d$
		深水4.2/ $K d$	深水4.0/ $K d$
		$0.32 + 0.013 d 2$ m, 2σ	$0.32 + 0.013 d 2$ m, 2σ
	测深精度	$0.32 + 0.013 d 2$ m, 2σ	$0.32 + 0.013 d 2$ m, 2σ	0.025 m	0.5 m
	测深精度	水深 0.8 m×0.8 m 陆地 0.3 m×0.3 m	水深 0.8 m×0.8 m 陆地 0.1 m×0.1 m	0.025 m	0.5 m
	测点密度	水深 0.8 m×0.8 m 陆地 0.3 m×0.3 m	水深 0.8 m×0.8 m 陆地 0.1 m×0.1 m	标称69 pts/m²	2 m×2 m

Tab.1 Main technical specifications of typical ALB system

Fig.1 Schematic diagram of bathymetric survey^[10]

Fig.2-1 Profile analysis of ALB system based on topographic survey

Fig.2-2 Profile analysis of ALB system based on topographic survey

Fig.3 Land and sea integrated topographic survey(CZMIL Nova)

Fig.4 Bottom reflectivity curves (taken from test report of AGRS)

Tab.2 Statistics of the maximum detection depth(Optech,2013)

Fig.5 Technology flow of ALB survey

Fig.6 Calibration result of laser

Tab.3 Statistics of laser measurement accuracy in test area(m)

Fig.7 Application of land and sea integrated topographic products

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