Optical calibration, bathymetry, water column correction and bottom typing of shallow marine areas, using passive remote sensing imageries
Bathymetry and water column correction
LANDSAT 8 OLIP 
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 LC80090452015299LGN00
Jan 14th 2016
Work done september 2016
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DTM seatruth   RMSE=0.68 m
   
Z4SM vs ZDTM+1.9m 
  
ZDTM+1.9m  and Z4SM
 
  
ZDTM+1.9m - Z4SM
see legend
 







Data and Deglinting

TOA TCC: raw image
logaritmic enhancement

TOA TCC deglinted image
same logaritmic enhancement

 




Calibration
16U data are scaled to allow for comfortable screen display

Calibration diagram for the whole scene
for bands Blue, Green, Red and NIR
KBLUE/KGREEN=0.48 => Jerlov water type OIB+0.3

 

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

 




Ready for modeling
  
BOA TCC: water column corrected
 
  
Retrieved depthin centimeters
see legend

 



Bottom typing
  
SAM classified image
see legend for SAM
  
Average bottom brightness



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