PI MON 1 — NGS DI2810 — Waipahu, US

This triangulation station is part of the National Geodetic Survey's network, which establishes the fundamental control framework for surveying and mapping activities throughout the United States. Located near Waipahu on the island of Oahu, Hawaii, at coordinates 21.34895° N, 158.02572° W with an ellipsoidal elevation of 28.7 meters, this trig point serves as a reference for horizontal and vertical control. Triangulation stations of this type provide precise spatial reference points essential for cadastral surveys, engineering projects, and geographic information systems. Documentation and periodic verification of such benchmarks remain critical to maintaining the integrity of the geodetic network and ensuring accuracy in surveying work conducted across Hawaii and adjacent areas. These control points support both public and private surveying endeavors dependent on reliable positional references.

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