Abstract Forecasting road conditions is important, especially in areas with wintry and rapidly changing weather. Accurate forecasts help authorities keep roads safe optimize maintenance. Considering local features important when making the forecast because surface temperature can vary significantly depending on surroundings. For example, a shadowed location, be lower than open A weather model d...

Abstract. Terrain parameters like topographic horizon and sky view factor (SVF) are used in numerous fields applications. In atmospheric climate modelling, such utilised to parameterise the effect of terrain geometry on radiation exchanges between surface atmosphere. Ideally, these derived from a high-resolution digital elevation model (DEM) because inferring them coarser data induces smoothing...

In hot, arid regions on university campuses, students are more vulnerable to heat stresses than in street canyons terms of function; however, the knowledge impact built environments thermal performance is still lacking. two summer and winter days, shading effect existing urban trees pattern a campus Egypt was examined correlate their Sky View Factor (SVF) with environment, meteorology, Physiolo...

A recent model of celestial e-vector analysis by the bee assumes that polarization information is transformed into modulation of perceived brightness while the bee scans the sky by rotating its field of view. It is shown that the suggested simple strategy to read compass information from the polarization pattern of the sky in natural conditions can work only in a part of the sky close to the ze...

Sky View Factor (SVF, a dimensionless value between 0 and 1 representing obstructed and unobstructed sky, respectively) has an important influence on urban energy balance, and is a key contributor to the Urban Heat Island (UHI) effect experienced by heavily built up regions. Continuous urban SVF maps used in modeling the spatial distribution of UHI can be derived analytically using Lidar data; ...

In many applications, such as in urban physical simulations or in the study of the effect of the solar impact at different scales, models with different levels of detail are required. In this paper we propose an efficient system for quickly computing the Sky View Factor (SVF) for any point inside a large city. To do that, we embed the city into a regular grid, and for each cell we select a subs...