= create_cg =
create coarse grid 
{{{
Usage: create_cg [options] <input       file>
Options:
  --disable-elev    Will disable the elevation
  --disable-notify  Takes an argument. Arguments are ALL, WARN, NOTICE, INFO,
                    FATAL, DEBUG.  If you want multiple disables then just do
                    multiple --disable-notify on the command line.  All argument
                    are case insensitive.  Default is all are enabled.
  --ossim-logfile   takes a logfile as an argument.  All output messages are
                    redirected to the specified log file.  By default there is
                    no log file and all messages are enabled.
  -K                specify individual keywords to add to the preferences
                    keyword list: name=value
  -P                specify a preference file to load
  -T                specify the classes to trace, ex: ossimInit|ossimImage.* 
                    will trace ossimInit and all ossimImage classes
  -e                <error>  default is .1.  This is basically the pixel
                    accuracy of the grid
  -h or --help      Shows help
  -o                <base output name> Specify a new base output name default
                    it's base name is <image file>.dat and <image file>.geom.
                    If specified then the output is <base output name>.dat and
                    <base output name>.geom where the .dat is the coarse grid
                    and the .geom is the model
  -s                <min_line_sample_spacing> give the min line sample spacing
                    for the coarse grid.  Helps in converging. Basically will
                    stop splitting if number of pixels per grid cell gets
                    below this number.
}}}