NS 4 — NGS DR2311 — Kapolei, US

This triangulation station is part of the National Geodetic Survey's network of control points that establish the foundational reference framework for surveying and mapping throughout the United States and its territories. Located near Kapolei on the island of Oahu, Hawaii, this trig point serves as a monumented position of known horizontal coordinates: 21.36164° North latitude, 158.05519° West longitude. Trig stations like this one are established to provide surveyors, cartographers, and engineers with accurate positional references for local surveys and construction projects. These points are particularly valuable in Hawaii, where they support cadastral work, infrastructure development, and geographic information systems. Documentation and periodic verification of such benchmarks ensures the continued integrity of the geodetic network and facilitates reliable spatial data collection across the islands.

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