Air Mode
    Shows data in 3 hour intervals:
    Data file name for current time:
      current-type-surface-level-gfs-1.0.json
      in the /public/data/weather/current directory
    Data file name for a specific time/date
      hh24-type-surface-level-gfs-1.0.json
      in the /public/data/weather/yyyy/MM/dd directory
      ex.
        for 3:00 UTC on 2017/5/21
        0300-type-surface-level-gfs-1.0.json
        in /public/data/weather/2017/05/21 directory

      8 height settings:
        Data file name for surface:
          hh24-type-surface-level-gfs-1.0.json
        Data file name for a specific height:
          time-type-isobaric-[]hPa-gfs-1.0.json
          ex. current wind data for 250hPa
            current-wind-isobaric-250hPa-gfs-1.0.json

Ocean Mode
    Shows data in 5 day interval
    To name file:
      yyyyMMdd-surface-currents-oscar-0.33.json
      in the /public/data/oscar directory
    also create a JSON file of a list of all the files sorted,
    last item is the most recent date


Waves Mode
    Shows data in 5 day interval
    To name file:
      yyyyMMdd-surface-waves-oscar-0.33.json
      in the /public/data/ww3 directory
    also create a JSON file of a list of all the files sorted,
    last item is the most recent date
    The significant heights overlay file treated same as a type of Air Mode overlay

Link to original project: https://github.com/cambecc/earth/



Grib2json

A tool to convert grib2 files into JSON format used by this program
https://github.com/cambecc/grib2json

> grib2json --help
Usage: grib2json [options] FILE
	[--compact -c] : enable compact Json formatting
	[--data -d] : print GRIB record data
  [--filter.discipline --fd value] : select records with this discipline
    http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_table0-0.shtml
	[--filter.category --fc value] : select records with this numeric category
    http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_table4-1.shtml
	[--filter.parameter --fp value] : select records with this numeric parameter, or the string "wind" for both u, v components
    http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_table4-2.shtml
	[--filter.surface --fs value] : select records with this numeric surface type
    http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_table4-5.shtml
	[--filter.value --fv value] : select records with this numeric surface value
	[--help -h] : display this help
	[--names -n] : print names of numeric codes
	[--output -o value] : write output to the specified file (default is stdout)
	[--verbose -v] : enable logging to stdout

To extract wind files on surface level from grib2 files:
  go to the bin directory
  ./grib2json --n --d --fc 2 --fp wind --fs 103 --fv 10.0 -o outputfilename.json inputfilename.grib2
  ./grib2json --n --d --fc 2 --fp wind --fs 100 --fv 100 -o outputfilename.json inputfilename.grib2
  ./grib2json --n --d --fc 0 --fp 0 --fs 103 --fv 10.0 -o outputfilename.json inputfilename.grib2


To change the scope of the data covered i.e. if you just want the data of a small region
you can change the latitude and longitude in the JSON file.


The /public/libs/earth/products.js file contains the code for the different animations and overlay.
You can see the file path, change the color scale, etc.