Average calculation model (Heat Overlay): Difference between revisions
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The [[wind speed]] and [[direction]], measured at a weather station, are used to determine the window for averaging. | The [[wind speed]] and [[direction]], measured at a weather station, are used to determine the window for averaging. | ||
If the wind speed is: | If the wind speed is: | ||
* < 1.5 meter per second, the window is cell centered: 700x700; | * < 1.5 meter per second, the window is cell centered: 700x700 meters; | ||
* >= 1.5 meter per second, the window is 1100 x 500, centered at 1000 x 250 x 100 x 250, where the long edge 1000 is opposite of the wind direction. | * >= 1.5 meter per second, the window is 1100 x 500 meters, centered at 1000 x 250 x 100 x 250, where the long edge 1000 is opposite of the wind direction. | ||
[[File:Average_window_nowind_(Heat_Overlay).png|350px]][[File:Average_window_wind_(Heat_Overlay).png|350px]] | [[File:Average_window_nowind_(Heat_Overlay).png|350px]][[File:Average_window_wind_(Heat_Overlay).png|350px]] | ||
Revision as of 09:02, 24 September 2019
The wind speed and direction, measured at a weather station, are used to determine the window for averaging. If the wind speed is:
- < 1.5 meter per second, the window is cell centered: 700x700 meters;
- >= 1.5 meter per second, the window is 1100 x 500 meters, centered at 1000 x 250 x 100 x 250, where the long edge 1000 is opposite of the wind direction.
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The following parameters are averaged by this window:
- Vegetation fraction, originating as the fraction green/vegetation present in Buildings and Terrains;
- Sky view factor, calculated by the Sky view factor calculation model;