ISCHOOL — NGS DI2804 — Waipahu, US

This triangulation station is part of the National Geodetic Survey network, which establishes the primary geodetic control framework for the United States. Located near Waipahu on the island of Oahu, Hawaii, at coordinates 21.38182° N, 158.01418° W, this trig point serves as a horizontal and vertical reference for surveying and mapping activities throughout the Hawaiian islands region. Triangulation stations of this type are fundamental to precise surveying work, providing stable reference points for establishing property boundaries, engineering projects, and cartographic efforts. The documented ellipsoidal elevation of 34.4 meters contributes to the three-dimensional control network essential for modern geospatial applications. Verification and maintenance of such benchmarks remain critical for ensuring the accuracy and reliability of surveying operations. These reference points anchor local surveys to the national geodetic datum, supporting both public infrastructure and private surveying needs across Hawaii.

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