Please download the following

• 3289_rows by 3241_lines

• raw rasters

• without header

• either U8, or S16, or U16

• waimanalowv2m_deg.010.zip  

  • this is  the U8 WZ image

• waimanalowv2m_deg.015.zip

  • this is the U8 bottom typing image

• waimanalowv2m_deg.048.zip

  • this is the S16 ZC image

• waimanalowv2m_deg.049.zip

  • this is the S16 SHOALS DTM

• waimanalowv2m_deg.050.zip  

  • this is the S16 ZC-ZR image

• waimanalowv2m_deg_4SMdeglinted.zip 

  • this is the 8 bands U16 spectral Ron-deglinted 4SM-deglinted image
     

So that you can produce your own seatruth comparisons and illustrations.

You get my 4SM-deglinted version of Ron's deglinted spectral image:

• U16, NO smoothing at all

• Using my new deglinted version of Ron's deglinted image yields distinctly better results

• Can you further "clean" your own version, or my new version, by some math gimmick?

• What's the commercial potential?

Now I need to finalize the use of Stumpf's method.

• Lmyellow=4   
  waimanalowv2m_deg.048west.zip

  • this is the latest version of computed depth in centimeters, dated August 6th: in optimizes computed depths over the western area, from row 1 to row 1000

Final computed depth ZC

SHOALS Lidar DTM

ZC-ZR
using bands 1, 2, 3, 4 and 5
with strong thresholds on bands 4 and 5
Tide correction applied: 1.00 m

• blue tones for depth underestimated

• red tones for depth overestimated

all wavelengths at mid-waveband

-cWL/0.500/0.500/0.500/0.500/0.500/0.500/0.500/0.500
-M/@001/@002/0003/004/005/@006/@007/008
-Lm/0001.0/001.0/001.0/010.0/010.0/010.0/255.0/255.0
-KK2_3_0.3500/Knir8.0/Bm400_BG510_GR628_RN700/mask_3
-Z/LAT1.00/N_2/land_2.0001/YXgreen025_022/z21/cZ1.00
-Smooth/5/D/smart+

83.5% of computed depths
are within  +-2.0 m of DTM depth

ZC vs ZR regression
 

Depths computed based on

• red       band 5, 4, 3, 2, 1

  • note the vgery severe threshold

• yellow bands 4, 3, 2, 1

  • note the very severe threshold

• green   bands 3, 2, 1

ZZRegressor: Statistics of seatruth ZC-ZR
on image waimanalowv2m_deg at Oahu, Hawaii
N=5.609 millions pixels by Morel's 4SM method
stepDTM=1 Smooth=1_5 Using_bands_1_2_3_4_5 cZ=1.00

 1.79% pixels with depth underestimated by more than 5.0 m
 4.17% pixels with depth underestimated by more than 3.0 m
 6.78% pixels with depth underestimated by more than 2.0 m
13.71% pixels with depth underestimated by more than 1.0 m
35.68% pixels with depth underestimated by more than 0.0 m
25.91% pixels with depth  overestimated by less than 1.0 m
 8.15% pixels with depth  overestimated by less than 2.0 m
 2.27% pixels with depth  overestimated by less than 3.0 m
 1.16% pixels with depth  overestimated by less than 5.0 m
 0.37% pixels with depth  overestimated by more than 5.0 m

61.60% of computed depths are within  +-1.0 m of DTM depth
83.46% of computed depths are within  +-2.0 m of DTM depth
92.51% of computed depths are within  +-3.0 m of DTM depth
97.83% of computed depths are within  +-5.0 m of DTM depth
over a total of 100.00% of computed depths

Ron's deglinted image further Deglinted
Color composite bands 2, 3 and 4

Water column corrected CC bands 2, 3 and 4

Profile Yellow
from South to North

Profile Blue
from East to West