slcOLI_20141022-15m

scene LC80340432014295LGN00, October 22nd 2014
DATE_ACQUIRED = 2014-10-22
SCENE_CENTER_TIME = 17:48:05.3137776Z
Work done november 2016

GSD 15 m resampled
No sharpening

Ground truth

Regression October 22th 2014 vs Sonar Depths RMSE=0.95 m	Sonar Two Days seatruth depths raster not corrected for tide 15 m GSD see depth legend
Regression October 22nd 2014 vs DTM	DTM from U. of La Paz, Mexico resampled to 15 m GSD see depth legend
	Depth residuals ZDTM- Z4SM DTM - October 22nd 2014 see legend

Data and Deglinting

TOA TCC: raw image logarithmic enhancement	BOA TCC deglinted image logarithmic enhancement
Glint regressions using SWIR1 No pan-sharpening applied R2 values are fairly high 15 m resampling does not increase noise

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
0-20m: KBLUE/KGREEN~=0.63 Jerlov water type OIB+0.9, nice linear BPL line: denotes homogeneous brightest bottom in homogeneous waters 20-30m: clearing to OIB	Water appears to be distinctly clearer deeper than 20 m

Reflectance max at SanLorenzoChannel
It appears to be much darker than coral sand: terrigenous sediment
Coral sand is ~1.7 times brighter than Brightest bottom in this scene

ReflectanceCoralSand.........................-RM/0.310/0.380/0.440/0.550/0.560/0.670/0.700

ReflectanceMax slcOLI_20141022......-RM/0.167/0.215/0.304/0.332/0.335/0.415/0.430

Ready for modeling

BOA CC WCC normalized
BGR color composite:

Blue =Coastal band
Green=Green band
Red =Blue band

Retrieved depth
see legend

Bottom typing

SAM classified image see legend for image SAM	Average bottom brightness see legend for image B
GREEN colour denotes a green WCC reflectance compared to average Coastal+Blue WCC reflectance,whatever the bottom brightness conversely PINK colour denotes a weak green WCC reflectance compared to average Coastal+Blue WCC reflectance,whatever the bottom brightness	What I call "average bottom brightness" is actually the average Coastal+Blue WCC reflectance scaled 0-200 What we see here: seasonal variation?
SAM spectral angle mapper SA=(Rcoastal+Rblue)/(2*Rgreen) R values are reflectances (0-1) (SA is usually converted into radians) SA for the current pixel is compared with SA for type10 signature (which is the brightest bottom signature) Reflectances for the type10 signature are noted on the plot: Rcoastal=0.167 Rblue =0.215 Rgreen =0.303 SAtype10 =0.630 SAcoralsand=0.784 Fabio, I hope you get familiar with classifications, particularly with the art of spectral angle mapping
type 12 pixel: SA=0.550 Rcoastal=0.050 Rblue =0.061 Rgreen =0.101	type 32 pixel SA=0.672 Rcoastal=0.149 Rblue =0.190 Rgreen =0.253

Download
slcOLI_20141022_15mresults.zip 48 MB
PAN sharpened by Yann using R
updated November 13th 2016
from my GoogleDrive

Contains the following
Channel Descriptor file="slcOLI_20141022_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---------------------