Optical calibration, bathymetry, water column correction and bottom typing of shallow marine areas, using passive remote sensing imageries
Bathymetry and water column correction
at Caicos Bank, Bahamas
4018*4149, 30 m pixel size, UTM zone 18, downloaded from USGS

Panchromatic band
Using the Panchromatic band for water column correction to derive water depth and spectral bottom signature:

Landsat 8 OLIP bandset used for this work

Coastal_1Blue_2Green_3PAN_4Red_5NIR_6 and SWIR1_7

Please refer to Bora Bora and Sanaa
for use of the PANchromatic band for water column correction

  scene LC80090452016110LGN00
May 21rst  2016
work done september 2016


This is spring time in the Bahamas


DTM seatruth RMSE=0.64 m
        ZDTM+0.8m - Z4SM
     ZDTM+0.8m - Z4SM
see legend
<==This histogram is a good way 
to estimate a tide height,
rather than the regression

Data and Deglinting

TOA TCC: raw image

BOA TCC deglinted image

16U data are scaled to allow for comfortable screen display

Calibration diagram for the whole scene
for bands Coastal, Green, Red and NIR
KBLUE/KGREEN=0.56 => Jerlov water type OIB+0.58


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


Ready for modeling

BOA TCC: water column corrected

Retrieved depth
see legend


Bottom typing

SAM classified image
see legend for SAM

Average bottom brightness
notice several super_brightness spots


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