scene LC80340432016061LGN00, March 01rst 2016
DATE_ACQUIRED = 2016-03-01
    SCENE_CENTER_TIME = "17:47:45.1553002Z"
Work done november 2016

GSD 15 m Rstudio_sharpened by Yann
data are scaled into a weird range
No sweat though: 4SM is a "ratio" method



Ground truth
How sad!

Regression March 1th 2016    vs   Sonar Depths RMSE=1.89 m	Sonar Two Days seatruth depths raster not corrected for tide 15 m GSD see depth legend
Regression March 01rst 2016   vs   DTM	DTM from U. of La Paz, Mexico resampled to 15 m GSD see depth legend
	ZDTM - Z4SM DTM - March 01rst 2016 see legend

Data and Deglinting

TOA TCC: raw image logarithmic enhancement NOTE the bad green waters flowing from SE through channel towards NW	BOA TCC deglinted image logarithmic enhancement
Glint regressions using SWIR1 No pan-sharpening applied R2 values are fairly high 15 m pansharpening does not increase noise R_sharpened data include a very large offset
Green Rpansharpened R-pansharpening slight mis-registration and five fancy dark pixels can cause artifacts	Pan band

Optical calibration
for the whole image
16U data are scaled to allow for comfortable screen display

Calibration diagram for the whole image for bands Blue, Green, Red and NIR	Calibration diagram for the whole image for bands Blue, PAN, Red, NIR CoefKPan=1.05
0-15m: KBLUE/KGREEN=0.713 Jerlov water type OII+0.3 clear waters 15-30m: becoming clearer	Calibration ignores the "Green" waters which are likely to be less clear which are likely to cause artifacts: depth underestimation dark bottoms

Ready for modeling
A complex situation produces weird results
Combined depths shall be needed

BOA CC WCC normalized CoefNorm=7.5 (usually 2.5) BGR color composite: Blue=Coastal band Green=Green band Red=Blue band

Retrieved depth see legend

Profile Black

Profile Black

Location of Profile Black WEST sections A and B: bad and puzzling results maybe turbid waters play trick EAST sections C and D: very nice results

Bottom typing

SAM classified image see legend for image SAM	Average bottom brightness NOTE the very dark bottom artifact see legend for image B
How weird/nice that the scaling of the data by the R pan-sharpening routine does not preclude SAM mapping!	Well: that's what they mean by a "ratio" method!

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Download
slcOLI_20160301_15mresults.zip 52 MB
from my GoogleDrive
 

Contains the following Channel Descriptor    file="slcOLI_20160301_15mresults.pix";  1 U8 SAM bottom typing-----------------------------  2 U8 image B average bottom brightness (0-200)-----  3 U8 image Z in decimeters-------------------------  4 U8 WCC reflectance (0-250) at 440.0 nm-----------  5 U8 WCC reflectance (0-250) at 480.0 nm-----------  6 U8 WCC reflectance (0-250) at 560.0 nm-----------  7 U8 WCC reflectance (0-250) at 590.0 nm-----------  8 U8 WCC reflectance (0-250) at 655.0 nm-----------  9 U8 WCCnormalized (0-250) at 440.0 nm>B----------- 10 U8 WCCnormalized (0-250) at 560.0 nm>G----------- 11 U8 WCCnormalized (0-250) at 480.0 nm>R----------- 12 S16 Z4SM in centimeters-------------------------- 13 S16 ZDTM in centimeters-------------------------- 14 S16 ZDTM-Z4SM in centimeters---------------------

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