Agha Posted April 22 Report Share Posted April 22 Hello folks! I am trying to use the Lyzenga Algorithm for estimating the depth of water in shallower areas, probably depths under 8-10 meters of lakes. First of all, how accurate is this algorithm in practice? Secondly, lets say i have the band values. can someone explain me how to retrieve those depths? I am following the "Lyzenga Algorithm for Shallow Water Mapping Using Multispectral Sentinel-2 Imageries in Gili Noko Waters" paper, but there are 3 steps of getting NDWIs, NDCIs and after filtering the Sun Glint Correction, then it finally comes to the depth calculating. it end ups in a formula of following: 𝑧 = 28.32 ∗ 𝑋1 − 36.25 ∗ 𝑋2 + 9.42 ∗ 𝑋3 + 16.35 x1 , x2, x3 are RGB values respectively. What do you guys think? can i just apply this formula ? if not, what is the purpose of all the previous steps, and will they change the rgb values anyways? Quote Link to comment Share on other sites More sharing options...
Lurker Posted Tuesday at 03:06 AM Report Share Posted Tuesday at 03:06 AM comparison of shallow water depth algorithm https://ejournal2.undip.ac.id/index.php/jkt/article/view/16050 Quote Link to comment Share on other sites More sharing options...
Agha Posted Wednesday at 08:41 AM Author Report Share Posted Wednesday at 08:41 AM Can you please address my question ?) is there any previous steps before calculation of models? Quote Link to comment Share on other sites More sharing options...
Lurker Posted Thursday at 01:42 AM Report Share Posted Thursday at 01:42 AM my previous post address your first question actually 😁 I saw that you already got the the equation for the band value and the depth, so it should be okay you directly apply it to get depth value Quote Link to comment Share on other sites More sharing options...
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