Simulating winter sunlight for 38,000 apartment complexes (terrain + building shadows)

In Korea, "how much winter sun does this apartment get?" is a real buying question, not a nice-to-have. And the honest answer isn't "look at the balcony direction" — it's a geometry problem with three moving parts: where the sun actually is in the sky in December, what hills and mountains sit on the horizon, and whether the building directly in... Weiterlesen