| l2extract | |
Creates an extracted Level 2 file.
Location
Details
Command Line Usage
SeaDAS-Toolobox -> SeaDAS Processors -> extractor
l2extract is used to create subscene files by extracting from SeaDAS created L2 files (SeaWiFS, MODIS, CZCS, OCTS). The output files are HDF files and have the same format as the original L2 files.
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| UI Element Name | Type | Description | Required/Optional | Default Value |
| infile | Text Field | Input MODIS Aqua or Terra L1A file to be extracted, or an L1A filelist for multiple file extraction. (Required) | Required | |
| ofile | Text Field | Output filename for the L1A extracted subscene. A default ofile name is generated by the program. | Required | |
| swlon | Text Field | Longitude of southwest corner of the box to be extracted. | Conditional | |
| swlat | Text Field | Latitude of southwest corner of the box to be extracted. | Conditional | |
| nelon | Text Field | Longitude of northeast corner of the box to be extracted. | Conditional | |
| nelat | Text Field | Latitude of northeast corner of the box to be extracted. | Conditional | |
| spix | Text Field | Starting pixel in infile for extracting. | Conditional | |
| epix | Text Field | Ending pixel in infile for extracting. | Conditional | |
| sscan | Text Field | Starting line in infile for extracting. | Conditional | |
| escan | Text Field | Ending line in infile for extracting. | Conditional | |
| pix_sub | Text Field | Pixel sub-sampling rate. | Optional | |
| sc_sub | Text Field | Scan line sub-sampling rate. | Optional | |
| prodlist | Text Field | Comma separated product list. | Optional |
| 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 l2extract 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. |
This is version 3.1 of l2extract (compiled on Nov 14 2024 12:14:30)
l2extract 3.1 (Nov 14 2024 12:13:34)
Usage: l2extract argument-list
or: l2extract ifile spix epix sline eline pix_sub sc_sub ofile <prodlist>
This program takes a product (or products if netCDF output) from an L2 file
and does the extraction
The argument list is a set of keyword=value pairs. Arguments can
be specified on the command line, or put into a parameter file, or the
two methods can be used together, with command line overriding.
The list of valid keywords follows:
help (boolean) (alias=h) (default=false) = print usage information
version (boolean) (default=false) = print the version
information
dump_options (boolean) (default=false) = print
information about each option
dump_options_paramfile (ofile) = print
information about each option to paramfile
dump_options_xmlfile (ofile) = print
information about each option to XML file
par (ifile) = input parameter file
ifile (ifile) = input L2 filename
ofile (ofile) (default=output) = output filename
product (string) = comma separated list of products, empty string outputs all
all products
spix (int) (default=1) = start pixel number (1-based).
epix (int) (default=-1) = end pixel number. -1 = last pixel (1-based).
sline (int) (default=1) = start line (1-based).
eline (int) (default=-1) = end line. -1 = last line (1-based).
suite (string) = suite for default parameters
verbose (boolean) (default=false) = more information reporting
wavelist (string) = comma separated list of 3D wavelengths and/or colon
separated nnn:nnn range of wavelengths, empty string outputs all
3D wavelengths (i.e. wavelist=353,355,358,360,360:370,450:600,700)