Michael Heizer's geometric platforms originated from his 1967 "negative sculpture" concept, North, East, South, West, which initially involved four large, geometric pits excavated in the Sierra Nevada mountains. Although the outdoor work was partially built and then dismantled, a permanent indoor version was commissioned by the Dia Art Foundation in 2002, installed at Dia:Beacon. This indoor installation features four distinct geometric shapes in the floor—a cube for North, a cone for South, a triangular trough for West, and an inverted truncated cone for East—to reflect the artist's interest in the discrepancies between mapped and physical space.