KAP BRDG — NGS DI2788 — Kapolei, US

This trigonometric station is part of the National Geodetic Survey's network of reference points that establish the geometric framework for the United States' surveying and mapping infrastructure. Located near Kapolei on the island of Oahu, Hawaii, at coordinates 21.33485° N, 158.04022° W, this trig point serves as a control station for horizontal and vertical datum establishment across the Hawaiian Islands region. Trigonometric stations function as monumented positions of known location and elevation, providing surveyors and geodesists with reliable reference marks for establishing local surveys, validating GPS observations, and maintaining spatial accuracy in geographic data collection. The ellipsoidal elevation of 29.4 meters contributes to the three-dimensional control network essential for modern surveying operations. Documentation and verification of such benchmarks remain critical for maintaining the integrity of the nation's geodetic infrastructure and ensuring consistency in surveying and mapping projects throughout the region.

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