Average calculation model (Heat Stress Overlay): Difference between revisions
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The [[Wind speed (Heat Stress Overlay)|wind speed]] and [[Wind direction (Heat Stress Overlay)|direction]] are used to determine the window for averaging values around a cell. Commonly, the values at a reference [[weather station (Heat Stress Overlay)|weather station]] are used. In calculations with a low wind speed, an cell-centered averaging window is used. | The [[Wind speed (Heat Stress Overlay)|wind speed]] and [[Wind direction (Heat Stress Overlay)|direction]] are used to determine the window for averaging values around a cell. Commonly, the values at a reference [[weather station (Heat Stress Overlay)|weather station]] are used. In calculations with a low wind speed, an cell-centered averaging window is used. For high wind speeds, an oblong averaging window is used, offsetting the cell along the wind direction. | ||
Wind speed: | Wind speed: | ||
* < 1.5 meter per second, the window is square and cell centered | * < 1.5 meter per second, the window is square and cell centered | ||
* >= 1.5 | * >= 1.5 meters per second, the window is oblong and offset toward the wind direction to account for wind effects. | ||
The averaging | The averaging windows are described below: | ||
{|class=wikitable | {|class=wikitable | ||
| Line 22: | Line 22: | ||
| {{anchor|Small window|Small window}} | | {{anchor|Small window|Small window}} | ||
| | | | ||
* [[Wind speed result type (Heat Overlay)|Wind speed]], based on the | * [[Wind speed result type (Heat Stress Overlay)|Wind speed]], based on the wind direction and wind speed parameters configured for the overlay. | ||
| [[File:Wind_window_sq(Heat_Overlay).png|250px|thumb|175x175 meters, cell-centered]] | | [[File:Wind_window_sq(Heat_Overlay).png|250px|thumb|175x175 meters, cell-centered]] | ||
| [[File:Wind_window_(Heat_Overlay).png|250px|thumb|280x140 meters, centered at 210x70x70x70]] | | [[File:Wind_window_(Heat_Overlay).png|250px|thumb|280x140 meters, centered at 210x70x70x70]] | ||
| Line 29: | Line 29: | ||
{{article end | {{article end | ||
|seealso= | |seealso= | ||
* [[Vegetation avg result type (Heat Overlay)|Vegetation fraction average result type]] | * [[Vegetation avg result type (Heat Stress Overlay)|Vegetation fraction average result type]] | ||
* [[Sky view avg result type (Heat Overlay)|Sky view factor average result type]] | * [[Sky view avg result type (Heat Stress Overlay)|Sky view factor average result type]] | ||
}} | }} | ||
{{Template:HeatOverlay_formula_nav}} | {{Template:HeatOverlay_formula_nav}} | ||
Latest revision as of 10:50, 13 October 2026
The wind speed and direction are used to determine the window for averaging values around a cell. Commonly, the values at a reference weather station are used. In calculations with a low wind speed, an cell-centered averaging window is used. For high wind speeds, an oblong averaging window is used, offsetting the cell along the wind direction.
Wind speed:
- < 1.5 meter per second, the window is square and cell centered
- >= 1.5 meters per second, the window is oblong and offset toward the wind direction to account for wind effects.
The averaging windows are described below:
| Window | Model | Low wind speeds | High wind speeds |
|---|---|---|---|
| Large window |
|
.png) |
.png) |
| Small window |
|
.png) |
.png) |
