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Merging Unmanned Aerial Systems (UAS) Imagery and Echo Soundings with an Adaptive Sampling Technique for Bathymetric Surveys

Laura Alvarez, Hernan Moreno, Antonio Segales, Tri Pham, Elizabeth Pillar-Little, Phillip Chilson
<span title="2018-08-28">2018</span> <i title="MDPI AG"> <a target="_blank" rel="noopener" href="" style="color: black;">Remote Sensing</a> </i> &nbsp;
In this manuscript, a novel, low-cost, rapid, and accurate method is developed to measure submerged topography, as an alternative to conventional approaches that require significant economic investments  ...  The second uses Structure from Motion (SfM) photogrammetry to cover shallower water areas no detected by the echosounder where the bed is visible from the sUAS.  ...  Under some assumptions, the Snell-Descartes law can be aproximated as h = n 2 h a (see Appendix B). h is the actual water depth, and h a is the apparent water depth extracted from the SfM-photogrammetry  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.3390/rs10091362</a> <a target="_blank" rel="external noopener" href="">fatcat:uhqm2x2r7zeb3jiwpuexjxxwya</a> </span>
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