Very High-Resolution Satellite-Derived Bathymetry and Habitat Mapping Using Pleiades-1 and ICESat-2

Remote Sensing

Alyson Le Quilleuc¹  Rodolphe Devillers²  Michael F. Jasinski³  Antoine Collin⁴ 

[1] ENSTA Bretagne Engineering School, 29200 Brest, France;Espace-Dev (IRD-UM-UG-UR-UA-UNC), 34934 Montpellier, France;NASA, Goddard Space Flight Center, Greenbelt, MD 20771, USA;Section des Sciences de la Vie et de la Terre, EPHE-PSL University, CNRS LETG, 35800 Dinard, France;

关键词: bathymetry;    Mayotte;    marine habitat;    coral reefs;    ICESat-2;    Pleiades-1;   

DOI  :  10.3390/rs14010133

来源: DOAJ

【 摘 要 】

Accurate and reliable bathymetric data are needed for a wide diversity of marine research and management applications. Satellite-derived bathymetry represents a time saving method to map large shallow waters of remote regions compared to the current costly in situ measurement techniques. This study aims to create very high-resolution (VHR) bathymetry and habitat mapping in Mayotte island waters (Indian Ocean) by fusing 0.5 m Pleiades-1 passive multispectral imagery and active ICESat-2 LiDAR bathymetry. ICESat-2 georeferenced photons were filtered to remove noise and corrected for water column refraction. The bathymetric point clouds were validated using the French naval hydrographic and oceanographic service Litto3D^® dataset and then used to calibrate the multispectral image to produce a digital depth model (DDM). The latter enabled the creation of a digital albedo model used to classify benthic habitats. ICESat-2 provided bathymetry down to 15 m depth with a vertical accuracy of bathymetry estimates reaching 0.89 m. The benthic habitats map produced using the maximum likelihood supervised classification provided an overall accuracy of 96.62%. This study successfully produced a VHR DDM solely from satellite data. Digital models of higher accuracy were further discussed in the light of the recent and near-future launch of higher spectral and spatial resolution satellites.

【 授权许可】

Unknown