Main functions for calculating:
shadowHeight, Shadow height at individual points or continuous surface
shadowFootprint, Polygonal layer of shadow footprints on the ground
SVF, Sky View Factor (SVF) value at individual points or continuous surface
Typical inputs for these functions include:
location, Queried location(s)
obstacles, A polygonal layer of obstacles (e.g. buildings) outline, with height attributes
solar_pos, Solar position (i.e. sun azimuth and elevation angles)
The package also provides functions for related preliminary calculations, such as:
toSeg, Converting polygons to line segments
classifyAz, Finding segment azimuth
shiftAz, Shifting segments by azimuth and distance
ray, Constructing a line between two points
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