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struct IconReader: GenericReaderDerived, GenericReaderProtocol {
typealias Domain = IconDomains
typealias Variable = IconVariable
typealias Derived = IconVariableDerived
typealias MixingVar = VariableOrDerived<IconVariable, IconVariableDerived>
let reader: GenericReaderCached<IconDomains, Variable>
let options: GenericReaderOptions
public init?(domain: Domain, lat: Float, lon: Float, elevation: Float, mode: GridSelectionMode, options: GenericReaderOptions) throws {
guard let reader = try GenericReader<Domain, Variable>(domain: domain, lat: lat, lon: lon, elevation: elevation, mode: mode) else {
return nil
}
self.reader = GenericReaderCached(reader: reader)
self.options = options
}
public init(domain: Domain, gridpoint: Int, options: GenericReaderOptions) throws {
let reader = try GenericReader<Domain, Variable>(domain: domain, position: gridpoint)
self.reader = GenericReaderCached(reader: reader)
self.options = options
}
func get(variable: VariableOrDerived<IconVariable, IconVariableDerived>, time: TimerangeDtAndSettings) throws -> DataAndUnit {
switch variable {
case .raw(let raw):
return try get(raw: raw, time: time)
case .derived(let derived):
return try get(derived: derived, time: time)
}
}
func get(raw: IconVariable, time: TimerangeDtAndSettings) throws -> DataAndUnit {
// icon-d2 has no levels 800, 900, 925
if reader.domain == .iconD2, case let .pressure(pressure) = raw {
let level = pressure.level
let variable = pressure.variable
switch level {
case 800:
return try self.interpolatePressureLevel(variable: variable, level: level, lowerLevel: 700, upperLevel: 850, time: time)
case 900:
return try self.interpolatePressureLevel(variable: variable, level: level, lowerLevel: 850, upperLevel: 950, time: time)
case 925:
return try self.interpolatePressureLevel(variable: variable, level: level, lowerLevel: 850, upperLevel: 950, time: time)
default: break
}
}
if case let .surface(surface) = raw {
if surface == .direct_radiation {
// Original ICON direct radiation data may contain small negative values like -0.2.
// Limit to 0. See https://github.com/open-meteo/open-meteo/issues/932
let direct = try reader.get(variable: .surface(.direct_radiation), time: time)
return DataAndUnit(direct.data.map({max($0,0)}), direct.unit)
}
// ICON-EPS stores total shortwave radiation in diffuse_radiation
// It would be possible to only use `shortwave_radiation`, but this would invalidate all archives
if reader.domain == .iconEps,surface == .diffuse_radiation {
let ghi = try reader.get(variable: raw, time: time)
let direct = try reader.get(variable: .surface(.direct_radiation), time: time)
return DataAndUnit(zip(ghi.data, direct.data).map({max($0-$1,0)}), ghi.unit)
}
// no dedicated rain field in ICON EU EPS
if reader.domain == .iconEuEps, surface == .rain {
let precipitation = try get(raw: .precipitation, time: time).data
let snow_gsp = try get(raw: .snowfall_water_equivalent, time: time).data
return DataAndUnit(zip(precipitation, snow_gsp).map({$0 - $1}), .millimetre)
}
// no dedicated rain field in ICON EPS and no snow, use temperautre
if reader.domain == .iconEps, surface == .rain {
let precipitation = try get(raw: .precipitation, time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
return DataAndUnit(zip(precipitation, temperature).map({$0 * ($1 <= 0 ? 0 : 1)}), .millimetre)
}
// EPS models do not have weather codes
if [.iconEuEps, .iconEps, .iconD2Eps].contains(reader.domain), surface == .weather_code {
let cloudcover = try get(raw: .cloud_cover, time: time).data
let precipitation = try get(raw: .precipitation, time: time).data
let snowfall = try get(variable: .derived(.surface(.snowfall)), time: time).data
let showers = reader.domain != .iconD2Eps ? nil : try get(raw: .surface(.showers), time: time).data
let cape = reader.domain == .iconEps ? nil : try get(raw: .surface(.cape), time: time).data
let gusts = reader.domain == .iconEps ? nil : try get(raw: .surface(.wind_gusts_10m), time: time).data
return DataAndUnit(WeatherCode.calculate(
cloudcover: cloudcover,
precipitation: precipitation,
convectivePrecipitation: showers,
snowfallCentimeters: snowfall,
gusts: gusts,
cape: cape,
liftedIndex: nil,
visibilityMeters: nil,
categoricalFreezingRain: nil,
modelDtSeconds: time.dtSeconds), .wmoCode
)
}
// In case elevation correction of more than 100m is necessary, always calculate snow manually with a hard cut at 0°C
if abs(reader.modelElevation.numeric - reader.targetElevation) > 100 {
// in case temperature > 0°C, remove snow
if surface == .snowfall_water_equivalent {
let snowfall = try reader.get(variable: .surface(.snowfall_water_equivalent), time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
return DataAndUnit(zip(snowfall, temperature).map({$0 * ($1 >= 0 ? 0 : 1)}), .millimetre)
}
// in case temperature <0°C, convert add snow to rain
if surface == .rain {
let rain = try reader.get(variable: .surface(.rain), time: time).data
let snowfall = try reader.get(variable: .surface(.snowfall_water_equivalent), time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
return DataAndUnit(zip(zip(rain, snowfall), temperature).map({$0.0 + max(0, $0.1 * ($1 >= 0 ? 1 : 0))}), .millimetre)
}
// Correct snow/rain in weather code according to temperature
if surface == .weather_code {
var weatherCode = try reader.get(variable: .surface(.weather_code), time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
for i in weatherCode.indices {
guard weatherCode[i].isFinite, let weathercode = WeatherCode(rawValue: Int(weatherCode[i])) else {
continue
}
weatherCode[i] = Float(weathercode.correctSnowRainHardCutOff(
temperature_2m: temperature[i]
).rawValue)
}
return DataAndUnit(weatherCode, .wmoCode)
}
}
}
// icon global and EU lack level 975
if reader.domain != .iconD2, case let .pressure(pressure) = raw, pressure.level == 975 {
return try self.interpolatePressureLevel(variable: pressure.variable, level: pressure.level, lowerLevel: 950, upperLevel: 1000, time: time)
}
return try reader.get(variable: raw, time: time)
}
func prefetchData(raw: IconVariable, time: TimerangeDtAndSettings) throws {
// icon-d2 has no levels 800, 900, 925
if reader.domain == .iconD2, case let .pressure(pressure) = raw {
let level = pressure.level
let variable = pressure.variable
switch level {
case 800:
try reader.prefetchData(variable: .pressure(IconPressureVariable(variable: variable, level: 700)), time: time)
try reader.prefetchData(variable: .pressure(IconPressureVariable(variable: variable, level: 850)), time: time)
return
case 900: fallthrough
case 925:
try reader.prefetchData(variable: .pressure(IconPressureVariable(variable: variable, level: 850)), time: time)
try reader.prefetchData(variable: .pressure(IconPressureVariable(variable: variable, level: 950)), time: time)
return
default: break
}
}
if case let .surface(surface) = raw {
// ICON-EPS stores total shortwave radiation in diffuse_radiation
if reader.domain == .iconEps, surface == .diffuse_radiation {
try reader.prefetchData(variable: raw, time: time)
try reader.prefetchData(variable: .surface(.direct_radiation), time: time)
return
}
// no dedicated rain field in ICON EU EPS
if reader.domain == .iconEuEps, surface == .rain {
try reader.prefetchData(variable: .surface(.precipitation), time: time)
try reader.prefetchData(variable: .surface(.snowfall_water_equivalent), time: time)
return
}
// no dedicated rain field in ICON EPS and no snow, use temperautre
if reader.domain == .iconEps, surface == .rain {
try reader.prefetchData(variable: .surface(.precipitation), time: time)
try reader.prefetchData(variable: .surface(.temperature_2m), time: time)
return
}
// EPS models do not have weather codes
if [.iconEuEps, .iconEps, .iconD2Eps].contains(reader.domain), surface == .weather_code {
try reader.prefetchData(variable: .surface(.precipitation), time: time)
try reader.prefetchData(variable: .surface(.cloud_cover), time: time)
if reader.domain != .iconEuEps {
try reader.prefetchData(variable: .surface(.snowfall_water_equivalent), time: time)
try reader.prefetchData(variable: .surface(.wind_gusts_10m), time: time)
try reader.prefetchData(variable: .surface(.cape), time: time)
}
if reader.domain == .iconEps {
// use temperature for snowfall
try reader.prefetchData(variable: .surface(.temperature_2m), time: time)
}
if reader.domain == .iconD2Eps {
try reader.prefetchData(variable: .surface(.showers), time: time)
}
return
}
// In case elevation correction of more than 100m is necessary, always calculate snow manually with a hard cut at 0°C
if abs(reader.modelElevation.numeric - reader.targetElevation) > 100 {
// in case temperature > 0°C, remove snow
if surface == .snowfall_water_equivalent {
try reader.prefetchData(variable: .surface(.snowfall_water_equivalent), time: time)
try reader.prefetchData(variable: .surface(.temperature_2m), time: time)
return
}
// in case temperature < 0°C, convert add snow to rain
if surface == .rain {
try reader.prefetchData(variable: .surface(.snowfall_water_equivalent), time: time)
try reader.prefetchData(variable: .surface(.rain), time: time)
try reader.prefetchData(variable: .surface(.temperature_2m), time: time)
return
}
// Correct snow/rain in weather code according to temperature
if surface == .weather_code {
try reader.prefetchData(variable: .surface(.weather_code), time: time)
try reader.prefetchData(variable: .surface(.temperature_2m), time: time)
return
}
}
}
// icon global and EU lack level 975
if reader.domain != .iconD2, case let .pressure(pressure) = raw, pressure.level == 975 {
let variable = pressure.variable
try reader.prefetchData(variable: .pressure(IconPressureVariable(variable: variable, level: 950)), time: time)
try reader.prefetchData(variable: .pressure(IconPressureVariable(variable: variable, level: 1000)), time: time)
return
}
return try reader.prefetchData(variable: raw, time: time)
}
/// TODO: duplicated code in meteofrance controller
private func interpolatePressureLevel(variable: IconPressureVariableType, level: Int, lowerLevel: Int, upperLevel: Int, time: TimerangeDtAndSettings) throws -> DataAndUnit {
let lower = try get(raw: .pressure(IconPressureVariable(variable: variable, level: lowerLevel)), time: time)
let upper = try get(raw: .pressure(IconPressureVariable(variable: variable, level: upperLevel)), time: time)
switch variable {
case .temperature:
// temperature/pressure is linear, therefore
// perform linear interpolation between 2 points
return DataAndUnit(zip(lower.data, upper.data).map { (l, h) -> Float in
return l + Float(level - lowerLevel) * (h - l) / Float(upperLevel - lowerLevel)
}, lower.unit)
case .wind_u_component:
fallthrough
case .wind_v_component:
return DataAndUnit(zip(lower.data, upper.data).map { (l, h) -> Float in
return l + Float(level - lowerLevel) * (h - l) / Float(upperLevel - lowerLevel)
}, lower.unit)
case .geopotential_height:
return DataAndUnit(zip(lower.data, upper.data).map { (l, h) -> Float in
let lP = Meteorology.pressureLevelHpA(altitudeAboveSeaLevelMeters: l)
let hP = Meteorology.pressureLevelHpA(altitudeAboveSeaLevelMeters: h)
let adjPressure = lP + Float(level - lowerLevel) * (hP - lP) / Float(upperLevel - lowerLevel)
return Meteorology.altitudeAboveSeaLevelMeters(pressureLevelHpA: adjPressure)
}, lower.unit)
case .relative_humidity:
return DataAndUnit(zip(lower.data, upper.data).map { (l, h) -> Float in
return (l + h) / 2
}, lower.unit)
}
}
func prefetchData(raw: IconSurfaceVariable, time: TimerangeDtAndSettings) throws {
try prefetchData(variable: .raw(.surface(raw)), time: time)
}
func prefetchData(raw: IconPressureVariable, time: TimerangeDtAndSettings) throws {
try prefetchData(variable: .raw(.pressure(raw)), time: time)
}
func get(raw: IconSurfaceVariable, time: TimerangeDtAndSettings) throws -> DataAndUnit {
return try get(variable: .raw(.surface(raw)), time: time)
}
func get(raw: IconPressureVariable, time: TimerangeDtAndSettings) throws -> DataAndUnit {
return try get(variable: .raw(.pressure(raw)), time: time)
}
func prefetchData(derived: IconVariableDerived, time: TimerangeDtAndSettings) throws {
switch derived {
case .surface(let variable):
switch variable {
case .apparent_temperature:
try prefetchData(raw: .temperature_2m, time: time)
try prefetchData(raw: .wind_u_component_10m, time: time)
try prefetchData(raw: .wind_v_component_10m, time: time)
try prefetchData(raw: .relative_humidity_2m, time: time)
try prefetchData(raw: .direct_radiation, time: time)
try prefetchData(raw: .diffuse_radiation, time: time)
case .relativehumidity_2m:
try prefetchData(raw: .relative_humidity_2m, time: time)
case .dew_point_2m:
fallthrough
case .dewpoint_2m:
try prefetchData(raw: .relative_humidity_2m, time: time)
try prefetchData(raw: .temperature_2m, time: time)
case .wind_speed_10m:
fallthrough
case .windspeed_10m:
fallthrough
case .wind_direction_10m:
fallthrough
case .winddirection_10m:
try prefetchData(raw: .wind_u_component_10m, time: time)
try prefetchData(raw: .wind_v_component_10m, time: time)
case .wind_speed_80m:
fallthrough
case .windspeed_80m:
fallthrough
case .wind_direction_80m:
fallthrough
case .winddirection_80m:
try prefetchData(raw: .wind_u_component_80m, time: time)
try prefetchData(raw: .wind_v_component_80m, time: time)
case .wind_speed_120m:
fallthrough
case .windspeed_120m:
fallthrough
case .wind_direction_120m:
fallthrough
case .winddirection_120m:
try prefetchData(raw: .wind_u_component_120m, time: time)
try prefetchData(raw: .wind_v_component_120m, time: time)
case .wind_speed_180m:
fallthrough
case .windspeed_180m:
fallthrough
case .wind_direction_180m:
fallthrough
case .winddirection_180m:
try prefetchData(raw: .wind_u_component_180m, time: time)
try prefetchData(raw: .wind_v_component_180m, time: time)
case .snow_height:
try prefetchData(raw: .snow_depth, time: time)
case .shortwave_radiation:
try prefetchData(raw: .direct_radiation, time: time)
try prefetchData(raw: .diffuse_radiation, time: time)
case .direct_normal_irradiance:
try prefetchData(raw: .direct_radiation, time: time)
case .evapotranspiration:
try prefetchData(raw: .latent_heat_flux, time: time)
case .vapour_pressure_deficit:
fallthrough
case .vapor_pressure_deficit:
try prefetchData(raw: .temperature_2m, time: time)
try prefetchData(raw: .relative_humidity_2m, time: time)
case .et0_fao_evapotranspiration:
try prefetchData(raw: .direct_radiation, time: time)
try prefetchData(raw: .diffuse_radiation, time: time)
try prefetchData(raw: .temperature_2m, time: time)
try prefetchData(raw: .relative_humidity_2m, time: time)
try prefetchData(raw: .wind_u_component_10m, time: time)
try prefetchData(raw: .wind_v_component_10m, time: time)
case .snowfall:
if reader.domain == .iconEps {
try prefetchData(raw: .precipitation, time: time)
try prefetchData(raw: .temperature_2m, time: time)
} else {
try prefetchData(raw: .snowfall_water_equivalent, time: time)
}
case .surface_pressure:
try prefetchData(raw: .pressure_msl, time: time)
try prefetchData(raw: .temperature_2m, time: time)
case .terrestrial_radiation:
break
case .terrestrial_radiation_instant:
break
case .shortwave_radiation_instant:
try prefetchData(raw: .direct_radiation, time: time)
try prefetchData(raw: .diffuse_radiation, time: time)
case .diffuse_radiation_instant:
try prefetchData(raw: .diffuse_radiation, time: time)
case .direct_radiation_instant:
try prefetchData(raw: .direct_radiation, time: time)
case .direct_normal_irradiance_instant:
try prefetchData(raw: .direct_radiation, time: time)
case .is_day:
break
case .soil_moisture_0_1cm:
try prefetchData(raw: .soil_moisture_0_to_1cm, time: time)
case .soil_moisture_1_3cm:
try prefetchData(raw: .soil_moisture_1_to_3cm, time: time)
case .soil_moisture_3_9cm:
try prefetchData(raw: .soil_moisture_3_to_9cm, time: time)
case .soil_moisture_9_27cm:
try prefetchData(raw: .soil_moisture_9_to_27cm, time: time)
case .soil_moisture_27_81cm:
try prefetchData(raw: .soil_moisture_27_to_81cm, time: time)
case .wet_bulb_temperature_2m:
try prefetchData(raw: .temperature_2m, time: time)
try prefetchData(raw: .relative_humidity_2m, time: time)
case .cloudcover:
try prefetchData(raw: .cloud_cover, time: time)
case .cloudcover_low:
try prefetchData(raw: .cloud_cover_low, time: time)
case .cloudcover_mid:
try prefetchData(raw: .cloud_cover_mid, time: time)
case .cloudcover_high:
try prefetchData(raw: .cloud_cover_high, time: time)
case .weathercode:
try prefetchData(raw: .weather_code, time: time)
case .sensible_heatflux:
try prefetchData(raw: .sensible_heat_flux, time: time)
case .latent_heatflux:
try prefetchData(raw: .latent_heat_flux, time: time)
case .windgusts_10m:
try prefetchData(raw: .wind_gusts_10m, time: time)
case .freezinglevel_height:
try prefetchData(raw: .freezing_level_height, time: time)
case .sunshine_duration:
try prefetchData(raw: .direct_radiation, time: time)
case .global_tilted_irradiance, .global_tilted_irradiance_instant:
try prefetchData(raw: .direct_radiation, time: time)
try prefetchData(raw: .diffuse_radiation, time: time)
}
case .pressure(let variable):
let level = variable.level
switch variable.variable {
case .wind_speed:
fallthrough
case .windspeed:
fallthrough
case .wind_direction:
fallthrough
case .winddirection:
try prefetchData(raw: IconPressureVariable(variable: .wind_u_component, level: level), time: time)
try prefetchData(raw: IconPressureVariable(variable: .wind_v_component, level: level), time: time)
case .dew_point:
fallthrough
case .dewpoint:
try prefetchData(raw: IconPressureVariable(variable: .temperature, level: level), time: time)
try prefetchData(raw: IconPressureVariable(variable: .relative_humidity, level: level), time: time)
case .cloud_cover:
fallthrough
case .cloudcover:
try prefetchData(raw: IconPressureVariable(variable: .relative_humidity, level: level), time: time)
case .relativehumidity:
try prefetchData(raw: IconPressureVariable(variable: .relative_humidity, level: level), time: time)
}
}
}
func get(derived: IconVariableDerived, time: TimerangeDtAndSettings) throws -> DataAndUnit {
switch derived {
case .surface(let variable):
switch variable {
case .wind_speed_10m:
fallthrough
case .windspeed_10m:
let u = try get(raw: .wind_u_component_10m, time: time).data
let v = try get(raw: .wind_v_component_10m, time: time).data
let speed = zip(u,v).map(Meteorology.windspeed)
return DataAndUnit(speed, .metrePerSecond)
case .wind_direction_10m:
fallthrough
case .winddirection_10m:
let u = try get(raw: .wind_u_component_10m, time: time).data
let v = try get(raw: .wind_v_component_10m, time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .wind_speed_80m:
fallthrough
case .windspeed_80m:
let u = try get(raw: .wind_u_component_80m, time: time).data
let v = try get(raw: .wind_v_component_80m, time: time).data
let speed = zip(u,v).map(Meteorology.windspeed)
return DataAndUnit(speed, .metrePerSecond)
case .wind_direction_80m:
fallthrough
case .winddirection_80m:
let u = try get(raw: .wind_u_component_80m, time: time).data
let v = try get(raw: .wind_v_component_80m, time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .wind_speed_120m:
fallthrough
case .windspeed_120m:
let u = try get(raw: .wind_u_component_120m, time: time).data
let v = try get(raw: .wind_v_component_120m, time: time).data
let speed = zip(u,v).map(Meteorology.windspeed)
return DataAndUnit(speed, .metrePerSecond)
case .wind_direction_120m:
fallthrough
case .winddirection_120m:
let u = try get(raw: .wind_u_component_120m, time: time).data
let v = try get(raw: .wind_v_component_120m, time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .wind_speed_180m:
fallthrough
case .windspeed_180m:
let u = try get(raw: .wind_u_component_180m, time: time).data
let v = try get(raw: .wind_v_component_180m, time: time).data
let speed = zip(u,v).map(Meteorology.windspeed)
return DataAndUnit(speed, .metrePerSecond)
case .wind_direction_180m:
fallthrough
case .winddirection_180m:
let u = try get(raw: .wind_u_component_180m, time: time).data
let v = try get(raw: .wind_v_component_180m, time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .snow_height:
return try get(raw: .snow_depth, time: time)
case .apparent_temperature:
let windspeed = try get(derived: .surface(.windspeed_10m), time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
let relhum = try get(derived: .surface(.relativehumidity_2m), time: time).data
let radiation = try get(derived: .surface(.shortwave_radiation), time: time).data
return DataAndUnit(Meteorology.apparentTemperature(temperature_2m: temperature, relativehumidity_2m: relhum, windspeed_10m: windspeed, shortwave_radiation: radiation), .celsius)
case .shortwave_radiation:
let direct = try get(raw: .direct_radiation, time: time).data
let diffuse = try get(raw: .diffuse_radiation, time: time).data
let total = zip(direct, diffuse).map(+)
return DataAndUnit(total, .wattPerSquareMetre)
case .evapotranspiration:
let latent = try get(raw: .latent_heat_flux, time: time).data
let evapotranspiration = latent.map(Meteorology.evapotranspiration)
return DataAndUnit(evapotranspiration, .millimetre)
case .vapour_pressure_deficit:
fallthrough
case .vapor_pressure_deficit:
let temperature = try get(raw: .temperature_2m, time: time).data
let rh = try get(raw: .relative_humidity_2m, time: time).data
let dewpoint = zip(temperature,rh).map(Meteorology.dewpoint)
return DataAndUnit(zip(temperature,dewpoint).map(Meteorology.vaporPressureDeficit), .kilopascal)
case .direct_normal_irradiance:
let dhi = try get(raw: .direct_radiation, time: time).data
let dni = Zensun.calculateBackwardsDNI(directRadiation: dhi, latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time)
return DataAndUnit(dni, .wattPerSquareMetre)
case .et0_fao_evapotranspiration:
let exrad = Zensun.extraTerrestrialRadiationBackwards(latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time)
let swrad = try get(derived: .surface(.shortwave_radiation), time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
let windspeed = try get(derived: .surface(.windspeed_10m), time: time).data
let rh = try get(raw: .relative_humidity_2m, time: time).data
let dewpoint = zip(temperature,rh).map(Meteorology.dewpoint)
let et0 = swrad.indices.map { i in
return Meteorology.et0Evapotranspiration(temperature2mCelsius: temperature[i], windspeed10mMeterPerSecond: windspeed[i], dewpointCelsius: dewpoint[i], shortwaveRadiationWatts: swrad[i], elevation: reader.targetElevation, extraTerrestrialRadiation: exrad[i], dtSeconds: 3600)
}
return DataAndUnit(et0, .millimetre)
case .snowfall:
if reader.domain == .iconEps {
let precipitation = try get(raw: .precipitation, time: time).data
let temperature = try get(raw: .temperature_2m, time: time).data
// snowfall if temperature below 0°C
let snowfall = zip(precipitation, temperature).map({
$0 * ($1 < 0 ? 0.7 : 0)
})
return DataAndUnit(snowfall, SiUnit.centimetre)
}
let snow_gsp = try get(raw: .snowfall_water_equivalent, time: time).data
let snowfall = snow_gsp.map({$0 * 0.7})
return DataAndUnit(snowfall, SiUnit.centimetre)
case .relativehumidity_2m:
return try get(raw: .relative_humidity_2m, time: time)
case .dew_point_2m:
fallthrough
case .dewpoint_2m:
let temperature = try get(raw: .temperature_2m, time: time)
let rh = try get(raw: .relative_humidity_2m, time: time)
return DataAndUnit(zip(temperature.data, rh.data).map(Meteorology.dewpoint), temperature.unit)
case .surface_pressure:
let temperature = try get(raw: .temperature_2m, time: time).data
let pressure = try get(raw: .pressure_msl, time: time)
return DataAndUnit(Meteorology.surfacePressure(temperature: temperature, pressure: pressure.data, elevation: reader.targetElevation), pressure.unit)
case .terrestrial_radiation:
/// Use center averaged
let solar = Zensun.extraTerrestrialRadiationBackwards(latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time)
return DataAndUnit(solar, .wattPerSquareMetre)
case .terrestrial_radiation_instant:
/// Use center averaged
let solar = Zensun.extraTerrestrialRadiationInstant(latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time)
return DataAndUnit(solar, .wattPerSquareMetre)
case .shortwave_radiation_instant:
let sw = try get(derived: .surface(.shortwave_radiation), time: time)
let factor = Zensun.backwardsAveragedToInstantFactor(time: time.time, latitude: reader.modelLat, longitude: reader.modelLon)
return DataAndUnit(zip(sw.data, factor).map(*), sw.unit)
case .diffuse_radiation_instant:
let diff = try get(raw: .diffuse_radiation, time: time)
let factor = Zensun.backwardsAveragedToInstantFactor(time: time.time, latitude: reader.modelLat, longitude: reader.modelLon)
return DataAndUnit(zip(diff.data, factor).map(*), diff.unit)
case .direct_radiation_instant:
let direct = try get(raw: .direct_radiation, time: time)
let factor = Zensun.backwardsAveragedToInstantFactor(time: time.time, latitude: reader.modelLat, longitude: reader.modelLon)
return DataAndUnit(zip(direct.data, factor).map(*), direct.unit)
case .direct_normal_irradiance_instant:
let direct = try get(raw: .surface(.direct_radiation), time: time)
let dni = Zensun.calculateBackwardsDNI(directRadiation: direct.data, latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time, convertToInstant: true)
return DataAndUnit(dni, direct.unit)
case .is_day:
return DataAndUnit(Zensun.calculateIsDay(timeRange: time.time, lat: reader.modelLat, lon: reader.modelLon), .dimensionlessInteger)
case .soil_moisture_0_1cm:
return try get(raw: .soil_moisture_0_to_1cm, time: time)
case .soil_moisture_1_3cm:
return try get(raw: .soil_moisture_1_to_3cm, time: time)
case .soil_moisture_3_9cm:
return try get(raw: .soil_moisture_3_to_9cm, time: time)
case .soil_moisture_9_27cm:
return try get(raw: .soil_moisture_9_to_27cm, time: time)
case .soil_moisture_27_81cm:
return try get(raw: .soil_moisture_27_to_81cm, time: time)
case .wet_bulb_temperature_2m:
let temperature = try get(raw: .temperature_2m, time: time)
let rh = try get(raw: .relative_humidity_2m, time: time).data
return DataAndUnit(zip(temperature.data, rh).map(Meteorology.wetBulbTemperature), temperature.unit)
case .cloudcover:
return try get(raw: .cloud_cover, time: time)
case .cloudcover_low:
return try get(raw: .cloud_cover_low, time: time)
case .cloudcover_mid:
return try get(raw: .cloud_cover_mid, time: time)
case .cloudcover_high:
return try get(raw: .cloud_cover_high, time: time)
case .weathercode:
return try get(raw: .weather_code, time: time)
case .sensible_heatflux:
return try get(raw: .sensible_heat_flux, time: time)
case .latent_heatflux:
return try get(raw: .latent_heat_flux, time: time)
case .windgusts_10m:
return try get(raw: .wind_gusts_10m, time: time)
case .freezinglevel_height:
return try get(raw: .freezing_level_height, time: time)
case .sunshine_duration:
let directRadiation = try get(raw: .direct_radiation, time: time)
let duration = Zensun.calculateBackwardsSunshineDuration(directRadiation: directRadiation.data, latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time)
return DataAndUnit(duration, .seconds)
case .global_tilted_irradiance:
let directRadiation = try get(raw: .direct_radiation, time: time).data
let diffuseRadiation = try get(raw: .diffuse_radiation, time: time).data
let gti = Zensun.calculateTiltedIrradiance(directRadiation: directRadiation, diffuseRadiation: diffuseRadiation, tilt: try options.getTilt(), azimuth: try options.getAzimuth(), latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time, convertBackwardsToInstant: false)
return DataAndUnit(gti, .wattPerSquareMetre)
case .global_tilted_irradiance_instant:
let directRadiation = try get(raw: .direct_radiation, time: time).data
let diffuseRadiation = try get(raw: .diffuse_radiation, time: time).data
let gti = Zensun.calculateTiltedIrradiance(directRadiation: directRadiation, diffuseRadiation: diffuseRadiation, tilt: try options.getTilt(), azimuth: try options.getAzimuth(), latitude: reader.modelLat, longitude: reader.modelLon, timerange: time.time, convertBackwardsToInstant: true)
return DataAndUnit(gti, .wattPerSquareMetre)
}
case .pressure(let variable):
let level = variable.level
switch variable.variable {
case .wind_speed:
fallthrough
case .windspeed:
let u = try get(raw: IconPressureVariable(variable: .wind_u_component, level: level), time: time)
let v = try get(raw: IconPressureVariable(variable: .wind_v_component, level: level), time: time)
let speed = zip(u.data,v.data).map(Meteorology.windspeed)
return DataAndUnit(speed, u.unit)
case .wind_direction:
fallthrough
case .winddirection:
let u = try get(raw: IconPressureVariable(variable: .wind_u_component, level: level), time: time).data
let v = try get(raw: IconPressureVariable(variable: .wind_v_component, level: level), time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .dew_point:
fallthrough
case .dewpoint:
let temperature = try get(raw: IconPressureVariable(variable: .temperature, level: level), time: time)
let rh = try get(raw: IconPressureVariable(variable: .relative_humidity, level: level), time: time)
return DataAndUnit(zip(temperature.data, rh.data).map(Meteorology.dewpoint), temperature.unit)
case .cloud_cover:
fallthrough
case .cloudcover:
let rh = try get(raw: IconPressureVariable(variable: .relative_humidity, level: level), time: time)
return DataAndUnit(rh.data.map({Meteorology.relativeHumidityToCloudCover(relativeHumidity: $0, pressureHPa: Float(level))}), .percentage)
case .relativehumidity:
return try get(raw: IconPressureVariable(variable: .relative_humidity, level: level), time: time)
}
}
}
}
struct IconMixer: GenericReaderMixer {
let reader: [IconReader]
static func makeReader(domain: IconReader.Domain, lat: Float, lon: Float, elevation: Float, mode: GridSelectionMode, options: GenericReaderOptions) throws -> IconReader? {
return try IconReader(domain: domain, lat: lat, lon: lon, elevation: elevation, mode: mode, options: options)
}
}
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