to obtain a free commandline_licensekey
for a subset of a licensed_imagefile

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
I keep digging
until suitable data
become available
  • -LE/Lext[1]/Lext[2]/Lext[3]/Lext[4]
  • -LE1/1000/1/2000/OptionalZoneName
    • Variable: Lext[1]=startX >=1
    • Variable: Lext[2]= endX <=nbRow
    • Variable: Lext[3]=startY >=1
    • Variable: Lext[4]= endY <=nbLin
    • Comment: Zone (optional free comment)