6 factors weighted by importance: Ocean (3.0), Elevation (2.5), Horizon (2.5), Green Space (2.0), Building Openness (2.0), Inland Water (1.5). Missing factors excluded, not penalized.

Horizon: DEM elevation sampled at 5 distances in 8 directions. Low angle = open views. Negative = downhill (bonus).

Limitation: Based on terrain and proximity, not actual line-of-sight. Does not model individual building obstructions.