PUU KAILIO — NGS TU1644 — Waipahu, US

This triangulation station is part of the National Geodetic Survey's trigonometric network, which establishes precise horizontal control across the United States and its territories. Located near Waipahu on the island of Oahu, Hawaii, at coordinates 21.46236° N, 158.12087° W, this benchmark serves as a reference point for surveying and mapping activities throughout the Hawaiian archipelago. Trig stations of this type were historically established to create interconnected networks of known positions, enabling surveyors to conduct accurate land surveys, engineering projects, and cartographic work. Modern verification and documentation of such benchmarks remain valuable for maintaining the integrity of Hawaii's geodetic infrastructure, supporting infrastructure development, and ensuring consistency in surveying standards. The coordinates provided represent this point's position within the National Spatial Reference System.

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