ST MON — NGS TU1669 — Kapolei, US

This triangulation station is part of the National Geodetic Survey's network, which establishes the fundamental geodetic control framework for the United States. Located near Kapolei, Hawaii, at coordinates 21.31347° N, 158.09939° W, this trig point serves as a reference monument for precise positioning and surveying work throughout the Hawaiian Islands region. Triangulation stations of this type are essential infrastructure for cadastral surveys, engineering projects, and geographic information systems that depend on accurate horizontal control. The NGS network provides the authoritative geodetic datum for Hawaii and supports both public and private surveying activities. Verification and documentation of such control points remain valuable for maintaining survey accuracy and enabling researchers to access reliable positional data. Regular inspection and recovery of benchmark locations ensures continued utility of these foundational geodetic monuments.

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