Bathymetry and water column correction
LANDSAT 8 OLIP 
at Lee Stocking Island, Bahamas
Image courtesy of the U.S. Geological Survey
7671*7841 30 m pixel size, UTM zone 18


 
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=1, Blue=2, Green=3, PAN=4, Red=5, NIR=6 and SWIR1=7

home
 


scene LC80120442014029LGN00, Jan 29th 2014
Work done october 2016


 
Robustness: winter is the time of choice
As I don't have seatruth data, apart from the above speaker_harris_fig_01.png,
I used results obtained on this scene
as a seatruth DTM for the other scenes


Data and Deglinting

TOA TCC: raw image
BOA TCC deglinted image
NO discoloured waters


Calibration is excellent and straightforward in winter
16U data are scaled to allow for comfortable screen display

Calibration diagram for the whole scene
for bands Blue, Green, Red and NIR
 
Calibration diagram for the whole scene
for bands Coastal, Blue, PAN, NIR
 




Ready for modeling
No Smoothing applied
  
BOA TCC: water column corrected
some areas exhibit an excess of red radiance
 
Retrieved depth
see legend
 




Bottom typing

SAM classified image
see legend for SAM
Average bottom brightness
 

 



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