HK 22 — NGS DI2793 — Waipahu, US

This trigonometric station is part of the National Geodetic Survey network, which provides the foundational control points for surveying, mapping, and engineering projects throughout the United States. Located near Waipahu on the island of Oahu, Hawaii, this benchmark serves as a precise positional and vertical reference for regional geodetic work. Trigonometric stations of this class are traditionally established at elevated or prominent locations to facilitate sight lines for triangulation networks. The ellipsoidal elevation of 78.2 meters contributes to the three-dimensional control framework essential for modern surveying applications, including cadastral surveys, infrastructure development, and scientific monitoring. Verification and documentation of such reference points remain critical for maintaining survey accuracy and ensuring consistency across projects. This station's inclusion in the active NGS registry supports professional surveying practice and long-term geodetic infrastructure management in Hawaii.

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