Bathymetry and water column correction
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=1Blue=2Green=3PAN=4Red=5NIR=6 and SWIR1=7


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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