9 1 — NGS TU0618 — Kapolei, US

This triangulation station is part of the National Geodetic Survey's network of control points that establish the geometric framework for surveying, mapping, and engineering projects across the United States. Located near Kapolei on the island of Oahu, Hawaii, at coordinates 21.36090° N, 158.13161° W, this trig point serves as a precisely positioned reference for local geodetic work. Triangulation stations of this type provide fundamental horizontal control by establishing fixed, surveyed locations that surveying professionals can occupy and reference for subsequent measurements. The NGS network remains essential infrastructure for accurate spatial referencing throughout the nation and its territories. Documentation and verification of such benchmarks ensures their continued utility for surveyors, engineers, and cartographers. Field confirmation of marker condition and accessibility supports the reliability of this geodetic control network for current and future projects in the Hawaiian Islands.

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