SAN FRAN — NGS DI2796 — Waipahu, US

This triangulation station is part of the National Geodetic Survey's network, which establishes and maintains the fundamental control infrastructure for surveying and mapping activities throughout the United States. Located near Waipahu on the island of Oahu, Hawaii, this trig point serves as a reference monument for spatial positioning and geodetic control in the Hawaiian Islands region. The station's ellipsoidal elevation of 43.8 meters and published coordinates contribute to the three-dimensional control framework essential for accurate surveying, engineering projects, and geographic information systems. Triangulation stations of this type historically provided primary control before modern satellite positioning systems; they remain valuable reference points for verifying contemporary measurements and establishing localized survey networks. Proper documentation and periodic verification of such monuments ensure data integrity for professional surveyors and mapmakers relying on established geodetic control.

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