Average calculation model (Heat Overlay)

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;
• >= 1.5 meter per second, the window is 1100 x 500, centered as 1000 x 250 x 100 x 250, where the long edge 1000 is opposite of the wind direction.

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;