Negril85 tutorial
Model 1
return to Calibration 1  next to Model 2
 
 
 
 
 
 command line from Calibration 1

nice -20  4SM.4.08  -Process  -Origin/UofUpsala   
-DB/negril85/31_1_0_0/4_1/500_500/98.362_192.214/1_1               
-Mis/Jamaica/Negril/Landsat/TM/UpsalaU/UTM_19_008/0.030_0.030/22_NOV_1990       
-LS/0255.0/255.0/255.0/255.0           
-cWL/0.500/0.599/0.500/0.500_AutoCAL       
-M/@000001/00002/00003/00004           
@CP00090.0/023.0/011.0/005.0       
@CP00087.0/022.0/011.0/005.0       
@CP00085.0/021.0/011.0/005.0       
@CP00082.0/020.0/011.0/005.0       
@CP00079.0/019.0/011.0/005.0       
-LsM/163.1/080.4/113.6/096.7_AutoCAL       
-LsM/156.9/091.4/113.6/156.7           
-LsM/192.2/118.7/150.4/211.0_cLM=1.360       
-Lsw/066.5/017.1/011.3/005.9_AutoCAL       
-dLsw000.0/000.0/000.0/000.0           
-Lw/0007.7/001.5/000.0/000.0_AutoCAL       
-Lm/0001.0/001.0/001.0/255.0           
-KK1_2_0.8271/Knir4.500/mask_3       
-KK1_2_0.5900/Knir4.500/mask_3       
-Z/MSL0.00/n_1/RLBgb1.000_1.000/mask_3   
-B/tclNe/Bmin0/cLM1      .36           
@deglint/vRbaD/GlintM25.0       
-extract/v/mBPL1/mask_3           
-calibrate/v/BdSNpzG/BDh_12_13_34       
-Model/mask_3               
-Smooth/5/Smart+           

Run this script


 
 
Results of First Model
 


 

image_Z250 in channel_8
fairly nice results

image_B in channel_10
mostly dark bottoms, except along the beach


image_WZ in channel_6
Most shallow pixels exhibit a null bottom detection
 in the Red band


image_WR in channel_7
Most pixels in the 0-6 m depth range
require a fairly strong smoothing
   
 
 
Negative bottom contrast
 
  • Negative bottom contrast occurs whenever Ls-Lsw<Lm
  • Quite often an image does not exhibit any negative bottom contrast
  • Here, with so much seagrass thriving on a terrigeneous bottom, negative bottom contrast cannot be ignored
  • see Syntax_Z
  • with negative bottom contrast enabled, bottoms are still modeled, even though their bottyom reflectance may be less than that of the water in the Blue bands
  • This can be risky where the image is noisy
 

image_Z250 in channel_8
fairly nice results

-Z/MSL0.00/n_1/RLBgb1.000_1.0/mask_3   
negative bottom contrast disabled

-Z/MSL0.00/N_1/RLBgb1.000_1.0/mask_3   
negative bottom contrast enabled
   
   
 
 
toto


 
   
   
   
 
 
 
toto


 
   
   
   
 

 



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