l3mapgen

l3mapgen

Creates a Level 3 mapped image.

Takes a product (or products if netCDF output) from an L3 bin file, reprojects the data using Proj.4 and writes a mapped file in the requested output format.

Location

SeaDAS-Toolobox -> SeaDAS Processors -> l3mapgen

GUI Usage
Command Line Usage

GUI Usage

Arguments/Keywords
UI Element Name Type Description Required/Optional Default Value
ifile ifile Input Level 3 bin file name. Required
ofile ofile output filename. Required
product string comma separated list of products. Required
projection string One of the following predefined (proj4) projections may be selected: 
        smi:       Standard Mapped image, cylindrical projection,
                   uses central_meridian.  NSEW defaults to whole globe.
                   projection="+proj=eqc +lon_0=<central_meridian>"
        platecarree: Plate Carree image, cylindrical projection,
                   uses central_meridian.
                   projection="+proj=eqc +lon_0=<central_meridian>"
        mollweide: Mollweide projection
                   projection="+proj=moll +lon_0=<central_meridian>"
        lambert:   Lambert conformal conic (2SP) projection
                   projection="+proj=lcc +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>
                                +lat_1=<scene south latitude>
                                +lat_2=<scene north latitude>"
        albersconic: Albers Equal Area Conic projection
                   projection="+proj=aea +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>
                                +lat_1=<scene south latitude>
                                +lat_2=<scene north latitude>"
        mercator:  Mercator cylindrical map projection
                   projection="+proj=merc +lon_0=<central_meridian>"
        transmerc:  Transverse Mercator cylindrical map projection
                   projection="+proj=tmerc +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>"
        utm:  Universal Transverse Mercator cylindrical map projection
                   projection="+proj=utm +zone=<utm_zone> [+south]"
        obliquemerc:  Oblique Mercator cylindrical map projection
                   projection="+proj=omerc +gamma=0 +lat_0=<lat_0>
                          +lonc=<central_meridian> +alpha=<azimuth>
                          +k_0=1 +x_0=0 +y_0=0"
        ease2:     EASE-Grid 2.0 projection
                   projection="EPSG:6933"
        stere:     Stereographic projection
                   projection="+proj=stere +lat_0=<lat_0> +lat_ts=<lat_ts>
                          +lon_0=<central_meridian>
                          +ellps=WGS84 +datum=WGS84 +units=m"
        conus:     USA Contiguous Albers Equal Area Conic USGS version
                   projection="+proj=aea +lat_1=29.5 +lat_2=45.5
                         +lat_0=23.0 +lon_0=-96 +x_0=0 +y_0=0
                         +ellps=GRS80 +datum=NAD83 +units=m"
        alaska:    Alaskan Albers Equal Area Conic USGS version
                   projection="EPSG:3338"
        gibs:      latitudinally dependent projection
                   Plate Carree between 60S and 60N
                   else use Polar Sterographic
                   North Polar: projection="EPSG:3413"
                   South Polar: projection="EPSG:3031"
         raw:       Raw dump of bin file contents.
Optional platecarree
resolution string size of output pixel (default from input file) in meters or SMI dimensions: 
         90km: 432 x 216 image for full globe
         36km: 1080 x 540
         18km: 2160 x 1080
         9km: 4320 x 2160
         4km: 8640 x 4320
         2km: 17280 x 8640
         1km: 34560 x 17280
         hkm: 69120 x 34560
         qkm: 138240 x 69120
         smi: 4096 x 2048
         smi4: 8192 x 4096
         land: 8640 x 4320
         #.#:  width of a pixel in meters
         #.#km:  width of a pixel in kilometers
         #.#deg:  width of a pixel in degrees
         width (int) = width of output image in pixels; supercedes resolution parameter.
Optional 9km
interp string interpolation method: 
        nearest: Nearest Neighbor
        bin:     bin all of the pixels that intersect the
                area of the output pixel
        area:    bin weighted by area all of the pixels that
                intersect the area of the output pixel
Optional nearest
pversion string Processing version string Optional Unspecified
north float Northern most Latitude Optional -999
south float Southern most Latitude Optional -999
east float Eastern most Longitude Optional -999
west float Western most Longitude Optional -999
oformat string format of the output file : 
        netCDF:  netCDF file, can contain more than one product
        hdf4:    HDF4 file (old SMI format)
        png:     PNG image file
        ppm:     PPM image file
        tiff:    TIFF file with georeference tags
Optional netCDF4
deflate int netCDF4 deflation level Optional 4
central_meridian float central meridian for projection in deg east. Used only
for raw dump and predefined projections as above.		 Optional 0
palfile ifile palette file name Optional palette filename default from product.xml
datamin float minimum value for data scaling Optional default from product.xml
datamax float maximum value for data scaling Optional default from product.xml
scale_type string data scaling type: 
        linear:   linear scaling
        log:      logarithmic scaling
        arctan:   arc tangent scaling
Optional default from product.xml
Product_rgb string Three products to use for RGB. Default is sensor-specific Optional rhos_670,rhos_555,rhos_412
fudge float fudge factor used to modify size of L3 pixels Optional 1.0
threshold float minimum percentage of filled pixels before an image is generated Optional 0
apply_pal boolean apply color palette: 
        yes: color image
        no: grayscale image
Optional yes
use_quality boolean should we do quality factor processing Optional yes
use_rgb boolean should we use product_rgb to make a pseudo-true color image Optional no

Actions/Buttons
UI Element Name Type Description
Browser Button Button Selects ifile/ofile
Load Parameters ... Button Reads in previously saved parameters and populates the fields in GUI.
Save Parameters ... Button Saves the current arguments in GUI in a file.
Run Button Executes the l2mapgen 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.

Common proj4 formatted projection strings for direct entry:

Albers Conic Equal Area: "+proj=aea +lat_0={latitude_of_center} +lon_0={longitude_of_center} +lat_1={standard_parallel_1}"
Cylindrical Equal Area: "+proj=cea +lat_ts={standard_parallel_1} +lon_0={longitude_of_center}"
Ease2: "+proj=cea +lat_ts=30.0 +lon_0={longitude_of_center}"
Equidistant Conic: "+proj=eqdc +lat_0={latitude_of_center} +lon_0={longitude_of_center} +lat_1={standard_parallel_1}"
Lambert Azimuthal Equal Area: "+proj=laea +lat_0={latitude_of_center} +lon_0={longitude_of_center}"
Lambert Conformal Conic: "+proj=lcc +lat_1={latitude_of_origin} +lon_0={longitude_of_origin}"
Mercator: "+proj=merc +lon_0={longitude_of_origin}"
Mollweide: "+proj=moll +lon_0={central_+meridian}"
Oblique Stereographic: "+proj=sterea +lat_0={latitude_of_origin} +lon_0={longitude_of_origin}"
PlateCaree: "+proj=eqc +lon_0={central_meridian}"
Sinusoidal: "+proj=sinu +lon_0={longitude_of_center}"
SMI: "+proj=eqc +lon_0={longitude_of_center}"
Tranverse Mercator: "+proj=tmerc +lat_0={latitude_of_origin} +lon_0={longitude_of_origin}"

Command Line Usage

 
l3mapgen 2.4.0-V2024.8 (Nov 14 2024 12:13:34)
Usage: l3mapgen argument-list

  This program takes a product (or products if netCDF output) from an L3 bin
  or SMI file, reprojects the data using proj.4 and writes a mapped file in
  the requested output format.

  Return values
    0 = All Good
    1 = Error
    110 = No valid data to map

  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
   suite (string) = suite for default parameters
   ifile (ifile) = input L3 bin filename

   ofile (ofile) (default=output) = output filename
   oformat (string) (default=netcdf4) = output file format
        netcdf4: netCDF4 file, can contain more than one product
        hdf4:    HDF4 file (old SMI format)
        png:     PNG image file
        ppm:     PPM image file
        tiff:    TIFF file with georeference tags
   ofile_product_tag (string) (default=PRODUCT) = sub-string in ofile name that will be substituted by the product name
   ofile2 (ofile) = second output filename
   oformat2 (string) (default=png) = second output file format
        same options as oformat
   deflate (int) (default=4) = netCDF4 deflation level

   product (string) = comma separated list of products.
        Each product can have an optional colon and modifier appended.
        For example, "product=chlor_a,chlor_a:stdev,Kd_490:nobs"
        Available modifiers:
            avg       average value (default)
            stdev     standard deviation
            var       variance
            nobs      number of observations in the bin
            nscenes   number of contributing scenes
            obs_time  average observation time (TAI93)
            bin_num   bin ID number

   wavelength_3d (string) = comma separated list of wavelengths for 3D products
   resolution (string) = size of output pixel (default from input file)
        in meters or SMI dimensions
        90km: 432 x 216 image for full globe
        36km: 1080 x 540
        18km: 2160 x 1080
         9km: 4320 x 2160
         4km: 8640 x 4320
         2km: 17280 x 8640
         1km: 34560 x 17280
         hkm: 69120 x 34560
         qkm: 138240 x 69120
         smi: 4096 x 2048
        smi4: 8192 x 4096
        land: 8640 x 4320
         #.#:  width of a pixel in meters
       #.#km:  width of a pixel in kilometers
      #.#deg:  width of a pixel in degrees
   width (int) = width of output image in pixels; supercedes resolution parameter.

   projection (string) (default=platecarree) = proj.4 projection string or one
        of the following predefined projections:
        smi:       Standard Mapped image, cylindrical projection,
                   uses central_meridian.  NSEW defaults to whole globe.
                   projection="+proj=eqc +lon_0=<central_meridian>"
        platecarree: Plate Carree image, cylindrical projection,
                   uses central_meridian.
                   projection="+proj=eqc +lon_0=<central_meridian>"
        mollweide: Mollweide projection
                   projection="+proj=moll +lon_0=<central_meridian>"
        lambert:   Lambert conformal conic (2SP) projection
                   projection="+proj=lcc +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>
                                +lat_1=<scene south latitude>
                                +lat_2=<scene north latitude>"
        albersconic: Albers Equal Area Conic projection
                   projection="+proj=aea +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>
                                +lat_1=<scene south latitude>
                                +lat_2=<scene north latitude>"
        aeqd:      Azimuthal Equidistant projection
                   projection="+proj=aeqd +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>"
        mercator:  Mercator cylindrical map projection
                   projection="+proj=merc +lon_0=<central_meridian>"
        transmerc:  Transverse Mercator cylindrical map projection
                   projection="+proj=tmerc +lon_0=<central_meridian>
                                +lat_0=<scene center latitude>"
        utm:  Universal Transverse Mercator cylindrical map projection
                   projection="+proj=utm +zone=<utm_zone> [+south]"
        obliquemerc:  Oblique Mercator cylindrical map projection
                   projection="+proj=omerc +gamma=0 +lat_0=<lat_0>
                          +lonc=<central_meridian> +alpha=<azimuth>
                          +k_0=1 +x_0=0 +y_0=0"
        ease2:     EASE-Grid 2.0 projection
                   projection="EPSG:6933"
        ortho:     Orthographic projection
                   projection="+proj=ortho +lat_0=<lat_0> +lon_0=<central_meridian>
                          +ellps=GRS80 +units=m"
        stere:     Stereographic projection
                   projection="+proj=stere +lat_0=<lat_0> +lat_ts=<lat_ts>
                          +lon_0=<central_meridian>
                          +ellps=WGS84 +datum=WGS84 +units=m"
        conus:     USA Contiguous Albers Equal Area Conic USGS version
                   projection="+proj=aea +lat_1=29.5 +lat_2=45.5
                         +lat_0=23.0 +lon_0=-96 +x_0=0 +y_0=0
                         +ellps=GRS80 +datum=NAD83 +units=m"
        alaska:    Alaskan Albers Equal Area Conic USGS version
                   projection="EPSG:3338"
        gibs:      latitudinally dependent projection
                   Plate Carree between 60S and 60N
                   else use Polar Sterographic
                   North Polar: projection="EPSG:3413"
                   South Polar: projection="EPSG:3031"
         raw:       Raw dump of bin file contents.

   write_projtext (boolean) (default=no) = write projection information to a text file.
   central_meridian (float) (default=-999) = central meridian for projection in deg east.
        Used only for raw dump and predefined projections as above.
   lat_ts (float) = latitude of true scale for projection in deg north.
        Used only for predefined projections above as required.
   lat_0 (float) = latitude of origin for projection in deg north.
        Used only for predefined projections above as required.
   lat_1 (float) = latitude of first standard parallel (south).
        Used only for predefined projections above as required.
   lat_2 (float) = latitude of second standard parallel (north).
        Used only for predefined projections above as required.
   azimuth (float) = projection rotation angle in deg north.
        Used only for predefined projections above as required.
   utm_zone (string) = UTM zone number.
        Used only for the UTM projection;
        Append 'S' for southern hemisphere zones (e.g. 59S).
   north (float) (default=-999) = Northernmost Latitude (default: file north)
   south (float) (default=-999) = Southernmost Latitude (default: file south)
   east (float) (default=-999) = Easternmost Longitude (default: file east)
   west (float) (default=-999) = Westernmost Longitude (default: file west)
   trimNSEW (boolean) (default=no) = should we trim output
        to match input NSEW range

   interp (string) (default=nearest) = interpolation method:
        nearest: use the value of the nearest bin for the pixel
        bin:     bin all of the pixels that intersect the area of the
                  output pixel
        area:    bin weighted by area of all the pixels that intersect
                  the area of the output pixel

   apply_pal (boolean) (default=yes) = apply color palette:
        yes: color image
         no: grayscale image
   palfile (ifile) = palette filename (default from product.xml)
   use_transparency (boolean) (default=no) = make missing data transparent (only valid for color PNG and TIFF)
   datamin (float) = minimum value for scaling (default from product.xml)
   datamax (float) = maximum value for scaling (default from product.xml)
   scale_type (string) = data scaling type (default from product.xml)
        linear:  linear scaling
        log:     logarithmic scaling
        arctan:  arc tangent scaling

   quiet (boolean) (default=false) = stop the status printing
   pversion (string) (default=Unspecified) = processing version string
   use_quality (boolean) (default=yes) = should we do quality factor processing
   quality_product (string) = product to use for quality factor processing
   use_rgb (boolean) (default=no) = should we use product_rgb to make a
        pseudo-true color image
   product_rgb (string) (default=rhos_670,rhos_555,rhos_412) = 
        Three products to use for RGB.  Default is sensor-specific.
   fudge (float) (default=1.0) = fudge factor used to modify size of L3 pixels
   threshold (float) (default=0) = minimum percentage of filled pixels before
        an image is generated
   num_cache (int) (default=500) = number of rows to cache in memory.
   mask_land (boolean) (default=no) = set land pixels to pixel value 254
   rgb_land (string) (default=160,82,45) = RGB value to use for land mask; comma separate string
   land (ifile) (default=$OCDATAROOT/common/landmask_GMT15ARC.nc) = land mask file
   full_latlon (boolean) (default=yes) = write full latitude and longitude arrays.

   doi (string) = Digital Object Identifier (DOI) string