Syntax_ProfileAB
To plot a spatial profile from Pixel_A to Pixel_B

back to Help

 


 
1 - NO NEED for field data, nor for atmospheric correction
2 - this is demonstrated in this website, using a variety of hyper/multi spectral data
 
Requirements are
1 - homogeneous water body and atmosphere
2 - some coverage of optically deep water
3 - some coverage of dry land
 
Problems are
1 - the precision on estimated depth is found wanting, because the noise-equivalent change in radiance  of accessible data is too high for shallow water column correction work 
2 - radiance data should be preprocessed by the provider at level 1 in order to improve S/N ratio
3 - exponential decay: the deeper/darker the bottom, the poorer the performances
 
So
I keep digging
until suitable data
become available
 


 

-ProfileAB* to get this help
-ProfileAB/LzrVWBc/nameSHP/chAB_1_2_3_4........................................PlotLS
-ProfileAB/lZrVWBc/profile_2/chAB_1_2_3..............................................PlotZB
-ProfileAB/lzRvWbc/profile_3/dTM/WZ_2_3/B_0_201/ZC_0_8_1_2/*........PlotZ23
  • L(l)..............PlotLS shall plot natural and smoothed/deglinted radiances vs distance
    • by default, /ch1_ch2_ch3...     is chblue, chgreen, chred, chnir 
  • Z(z)..............PlotZB shall process along the polyline(s)
    • by default,       /ch1_ch2_ch3...     is chblue, chgreen, chred
    • plot Z and blue, green and red water column corrected reflectances against distance
  • R(r).............PlotZ23 to plot Two-bands-case vs Three-bands-case depths
    • by default,      /ch1_ch2 is green and red
    • first model Z by wZ=3: the 3_bands case
    • then model Z by wZ=2: the 2_bands case
    • then format and display the ZZregression
      • and both depth profiles
  • V(v)................Verbose
  • W(w)........to plot waypoints
  • B(b)..........to plot water column corrected reflectances
  • C(c)..........colourflag for outliers of a regression diagram
 
  • nameSHP is the name of a polyline shapefile
    • any number of polylines may be specified
    • each of unlimited length 
 
  • D(d)TM..............to plot recorded depth if available
  • WZ......................WZmin_WZmax
  • B.........................BZmin_BZmax
  • ZC.......................ZRminZRmax DZmax NBminperBIN
  • ch1_ch2_ch3.....one or more bands to be represented in the Postscript plot: /ch1_ch2_ch3...
    • they must be specified in increasing order like .../1_2_3_5
    • only needed for options PlotLS and PlotZB
 
  • RunDeglinter or RunModeler must be specified
  • Output:
    • for the Z option, a nameSHP.txt textfile is written
    • a script named nameSHP_ProfileAB.sh shall be written and executed,
    • this displays a postscript file nameSHP_ProfileAB.eps

 

 
 
 


How to Profile_AB

 see tarawa-subset_profile_1