l1brsgen

l1brsgen

Creates a Level 1 browse (pseudo true color - RGB) file.

Location
Details
Command Line Usage

Location

Tools -> OCSSW Processing -> l1brsgen

Details

l1brsgen creates small subsetted bitmap samples of the larger datasets. The default SeaWiFS browse product is an 8-bit true color image created from the subsampled and Rayleigh corrected L1A bands. A 24-bit true color image can also be generated.

l1brsgen GUI

Arguments/Keywords
UI Element Name Type Description Required/Optional Default Value
ifile Text Field Input Level 1 data product. Required
geofile Text Field input L1 geolocation file name Conditional - MODIS only
ofile Text Field Output filename for generated Level-1B data product. Required
ofile[#] Text Field additional output L2 file name Optional
pversion Text Field processing version string Optional Unspecified
suite Text Field product suite string for loading suite-specific defaults Optional OC
resolution int processing resolution 
       -1: standard ocean 1km processing
     1000: 1km resolution including aggregated 250 and 500m land bands
      500: 500m resolution including aggregated 250 land bands and replication for lower resolution bands
      250: 250m resolution with replication for lower resolution bands
Conditional - Required for processing MODIS products -1
spixl int start pixel number Optional 1
epixl int end pixel number Optional -1
sline int start line number Optional 1
eline int end line number Optional -1
subsamp int subsampling interval Optional 1
rgb int bands to use for red, green and blue Optional [1,1,1]
atmocor boolean toggle atmospheric correction Optional on
datamin float minimum reflectance for scaling Optional 0.01
datamax float maximum reflectance for scaling Optional 0.9
stype int scaling type: 
        0: log
        1: linear
Optional 0
outmode int defines output format: 
        0: 8bit HDF
        1: 24bit HDF
        2: PPM
        3: flat binary
        4: PNG
Optional 0

Actions/Buttons
UI Element Name Type Description
Browser Button Button Selects infile/ofile
Load Parameters ... Button Reads in previously saved parameters and populates the fields in GUI.
Store Parameters ... Button Saves the current arguments in GUI in a file.
Run Button Executes the l1brsgen command with arguments provided in the UI.
Cancel Button Closes current processor GUI.
Apply Button Makes current arguments effective.
Open in SeaDAS Checkbox If selected, the ofile will be added to the open products list right after its generation.
? Button Displays the help content of the current command.

Command Line Usage

 
Usage: l1brsgen argument-list

  The argument-list is a set of keyword=value pairs. The arguments can
  be specified on the commandline, or put into a parameter file, or the
  two methods can be used together, with commandline over-riding.

The list of valid keywords follows:

   -help (boolean) (alias=-h,--help) (default=false) = print usage information
   -version (boolean) (alias=--version) (default=false) = print the version
        information
   -dump_options (boolean) (alias=--dump_options) (default=false) = print
        information about each option
   -dump_options_paramfile (ofile) (alias=--dump_options_paramfile) = print
        information about each option to paramfile
   -dump_options_xmlfile (ofile) (alias=--dump_options_xmlfile) = print
        information about each option to XML file
   par (ifile) = input parameter file
   pversion (string) (default=Unspecified) = processing version string
   suite (string) (default=OC) = product suite string for loading
        suite-specific defaults
   ifile (ifile) (alias=ifile1) = input L1 file name
   geofile (ifile) = input L1 geolocation file name (MODIS only)
   resolution (int) (default=-1) = processing resolution (MODIS only)
       -1: standard ocean 1km processing
     1000: 1km resolution including aggregated 250 and 500m land bands
      500: 500m resolution including aggregated 250 land bands and
           replication for lower resolution bands
      250: 250m resolution with replication for lower resolution bands
   ofile (ofile) (alias=ofile1) (default=output) = output L2 file #1 name, output vicarious L1B
        for inverse mode
   ofile[#] = additional output L2 file name
   spixl (int) (default=1) = start pixel number
   epixl (int) (default=-1) = end pixel number (-1=the last pixel)
   sline (int) (default=1) = start line number
   eline (int) (default=-1) = end line number (-1=the last line)
   subsamp (int) (default=1) = sub-sampling interval
   rgb (int) (default=[1,1,1]) = bands to use for red, green and blue
   atmocor (boolean) (default=on) = toggle atmospheric correction
   datamin (float) (default=0.01) = minimum reflectance for scaling
   datamax (float) (default=0.9) = maximum reflectance for scaling
   stype (int) (default=0) = scaling type
        0: log
        1: linear
   outmode (int) (default=0) = defines output format
        0: 8bit HDF
        1: 24bit HDF
        2: PPM
        3: flat binary
        4: PNG



The default band combination produces a "true-color" image
Other combinations may be chosen with the "rgb=" option.  The expected
argument to this option is a comma separated string of wavelengths that specifies
the desired bands in red-green-blue order.  For example, to produce a false
color SeaWiFS output image using 865, 670 and 555 nm
as the red, green, and blue values respectively, the option would be specified
as "rgb=865,670,555".