gee_misc.txt

// Function to get todays date in the form for an export
exports.todaysDate = function(sep){
  var today = new Date()
  var dd = today.getDate()
  var mm = today.getMonth()+1; //January is 0!
  var yyyy = today.getFullYear()

  if(dd<10) {
      dd = '0'+dd;
  }

  if(mm<10) {
      mm = '0'+mm;
  }

  today = mm + sep + dd + sep + yyyy;
  return today
}

// Function to get current time in the form for an export
exports.time = function(sep){
  var today = new Date()
  var hh = today.getHours()
  var mm = today.getMinutes()

  if(hh<10) {
    dd = '0'+dd}

  if(mm<10) {
    mm = '0'+mm}

  return hh + sep + mm
}

// Series of functions to get overlapping watersheds of a geometry
exports.get_watersheds_level5 = function (dfoFeature) {
  var basins = ee.FeatureCollection('ft:1IHRHUiWkgPXOzwNweeM89CzPYSfokjLlz7_0OTQl')
  return basins.filterBounds(dfoFeature)
}

exports.get_watersheds_level4 = function (dfoFeature) {
  var basins = ee.FeatureCollection('ft:1JRW4YKfVTZKLAH4x4JRsggsHZoXRRUQKTIOYgJOW')
  return basins.filterBounds(dfoFeature)
}

exports.get_watersheds_level3 = function (dfoFeature) {
  var basins = ee.FeatureCollection('ft:1asIZ7d9NqNIubAp2dNMvnAfRMd-9ih7kjcLnIzv6')
  return basins.filterBounds(dfoFeature)
}

// Functions to get geographic areas that are not represented in the HydroSheds
// dataset but present in DFO database.
exports.get_islands = function(dfo_feature) {
    var islands = ee.FeatureCollection('ft:14BijFeJ0MiV1CeP7FBst8P4Kf1Se0HK5Sfh78hJB')
    return islands.filterBounds(dfo_feature)
}

exports.get_american_somoa = function(dfo_feature) {
    var asm = ee.FeatureCollection('ft:1C79v82bd1QfIsdGfDFOo2sz2XIHJCiVnXWXBeX0_')
    return asm.filterBounds(dfo_feature)
}


// Create a list of days of year (1 day steps)
exports.getDateList = function(year_start, year_end, step){
  var doy = ee.List.sequence(1, 365, step)
  var years = ee.List.sequence(year_start, year_end)

  // Convert the years and doys to a list of dates to map over
  var dates = years.map(function(y) {
    return doy.map(function(d) {
      var date = ee.String(y).slice(0, 4).cat('-').cat(ee.String(d).slice(0, -2))
      return ee.Date.parse('y-D', date)
    })
  }).flatten()
  return dates
}