Model attributes (Heat Overlay): Difference between revisions

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| Wm<sup>-2</sup> / hr
| Wm<sup>-2</sup> / hr
| The amount of Sun radiation this hour, measured at a [[Weather station (Heat Overlay)|weather station]].
| The amount of Sun radiation this hour, measured at a [[Weather station (Heat Overlay)|weather station]].
|-
| [[Sun_daily_motion_(Heat_Overlay)|SUN_DAILY_MOTION]]
| factor
| A factor used in calculating the Atmospheric Temperature from the calculated Urban Heat Island value.
|-
|-
| [[Hourly temperature (Heat Overlay)|HOURLY_TEMPERATURE]]
| [[Hourly temperature (Heat Overlay)|HOURLY_TEMPERATURE]]
| °C
| °C
| The temperature at this hour, measured at a [[Weather station (Heat Overlay)|weather station]].
| The temperature at this hour, measured at a [[Weather station (Heat Overlay)|weather station]].
|-
| [[Wind speed (Heat Overlay)|WIND_SPEED]]
| m/s
| The wind speed measured at a [[Weather station (Heat Overlay)|weather station]] at the height of 10 meters above ground.
|-
| [[Wind direction (Heat Overlay)|WIND_DIRECTION]]
| [[Geo angle]]
| The wind direction viewed from above, with 0° corresponding to north, and increasing in a clockwise fashion.
|-
|-
| [[ Sun_altitude_(Heat_Overlay)|SUN_ALTITUDE]]
| [[ Sun_altitude_(Heat_Overlay)|SUN_ALTITUDE]]
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| [[Geo angle]]
| [[Geo angle]]
| The angle along the horizon, with 0° corresponding to north, and increasing in a clockwise fashion
| The angle along the horizon, with 0° corresponding to north, and increasing in a clockwise fashion
|-
| [[Sun_daily_motion_(Heat_Overlay)|SUN_DAILY_MOTION]]
| factor
| A factor used in calculating the Atmospheric Temperature from the calculated Urban Heat Island value.
|-
| [[Wind direction (Heat Overlay)|WIND_DIRECTION]]
| [[Geo angle]]
| The wind direction viewed from above, with 0° corresponding to north, and increasing in a clockwise fashion.
|-
| [[Wind speed (Heat Overlay)|WIND_SPEED]]
| m/s
| The wind speed measured at a [[Weather station (Heat Overlay)|weather station]] at the height of 10 meters above ground.
|-
|}
|}


Revision as of 10:09, 17 December 2019

The heat overlay's model calculations depend on a number of calculation-wide parameters. These parameters are available as attributes of the heat overlay and can be modified as such.

Attribute Unit Description
AVERAGED_LAST_RESULT boolean Whether to ignore the date-time setting for the last calculated timeframe, and show an average of the results of all preceding timeframes instead.
DAILY_AVG_RADIATION Wm-2 / hr The average of amount of sun radiation per hour per square meter for this day, measured at a weather station.
DAILY_AVG_WIND_SPEED m/s The daily average wind speed measured at a weather station at the height of 10 meters above ground.
DAILY_TEMPERATURE_MAX °C Maximum temperature measured at a weather station.
DAILY_TEMPERATURE_MIN °C Minimum temperature measured at a weather station.
DATES timestamp Dates define the amount of timeframes and are used to define the day and time for calculating sun angles.
EXCLUDE_BUILDINGS boolean
EXCLUDE_WATER boolean
FOLIAGE_AREAS boolean
HOURLY_HUMIDITY percentage The relative humidity of the air at this hour, measured at a weather station.
HOURLY_RADIATION Wm-2 / hr The amount of Sun radiation this hour, measured at a weather station.
HOURLY_TEMPERATURE °C The temperature at this hour, measured at a weather station.
SUN_ALTITUDE ° The sun angle up from the horizon.
SUN_AZIMUTH Geo angle The angle along the horizon, with 0° corresponding to north, and increasing in a clockwise fashion
SUN_DAILY_MOTION factor A factor used in calculating the Atmospheric Temperature from the calculated Urban Heat Island value.
WIND_DIRECTION Geo angle The wind direction viewed from above, with 0° corresponding to north, and increasing in a clockwise fashion.
WIND_SPEED m/s The wind speed measured at a weather station at the height of 10 meters above ground.

Notes

  • The sun altitude and azimuth are calculated automatically based on the project world location and the date.
  • Some model attributes have to be based on a reference weather station.
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Model attributes
Daily average radiation • Daily average wind speed • Daily maximum temperature • Daily minimum temperature • Dates • Exclude buildings • Exclude water • Exclude foliage height m • Foliage areas • Hourly humidity • Hourly radiation • Hourly temperature • Max shadow distance • Sun altitude • Sun azimuth • Sun daily motion • Wind direction • Wind speed
Building attributes
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Building elevation • Foliage height • Terrain elevation
Related
Calculation models and formulas • Feature attributes • Model attributes • Result types


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