Y 13 — NGS TU0612 — Kapolei, US

This triangulation station is part of the National Geodetic Survey's network, which establishes the fundamental control framework for surveying and mapping across the United States. Located near Kapolei on the island of Oahu, Hawaii, at coordinates 21.40311°N, 158.17675°W, this trig point serves as a reference for local and regional surveys. Triangulation stations of this type provide precise horizontal control through intervisibility with other monuments across distances. Such points are essential for establishing accurate property boundaries, infrastructure development, and cartographic work. The NGS network represents decades of fieldwork establishing interconnected control points that enable surveyors and engineers to reference their work to a common datum. Verification and documentation of existing benchmarks remains critical for maintaining geodetic infrastructure integrity. These monuments support both contemporary surveying practices and future reference, particularly in areas undergoing development like the Kapolei region.

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