Bathymetry and water column correction
LANDSAT 8 OLIP 
at Mulroy Bay, Ireland
Image courtesy of the U.S. Geological Survey
 
Using the Panchromatic band for water column correction
to derive water depth and spectral bottom signature:

Landsat 8 OLIP bandset used for this work
Purple=1Blue=2Green=3PAN=4Red=5NIR=6 and SWIR1=7

Work done july 2018
GSD 15 m
 
 
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HOW LONG?

  • Same day: once the image file is ready on disk, one work day is enough for an experienced 4SM practitioner to obtain a reasonable result out of a 4-bands image.
  • Longer: finishing can take a while, though, depending on
    • the radiometric quality of the image
      • system noise, banding, cross talk, bright target recovery
      • oblique viewing
    • the size and complexity of the scene
      • clouds and shadows
      • floating alien objects, like boats, seaweed mats, foam, etc
      • wind conditions and breaking waves
      • glints and adjacency effect
      • heterogeous water types, and locally foul waters

 




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