6 15 A — NGS TU0538 — Honolulu County, US

This trigonometric station is part of the National Geodetic Survey's network, which establishes the official horizontal and vertical control framework for the United States. Trigonometric stations serve as fundamental reference points for surveying, mapping, and engineering projects requiring precise spatial reference. Located in Honolulu County, Hawaii, this benchmark contributes to geodetic control in the Hawaiian Islands region. Such points were historically established through precise angular and distance measurements to create networks of known positions across the landscape. The coordinates 21.57306°N, 158.10750°W identify this station's location within the national spatial reference system. Documentation and verification of trigonometric stations remain important for surveyors and engineers undertaking projects requiring accurate positional data. Maintaining reliable records of control points ensures the integrity of subsequent surveying work and supports consistent mapping across jurisdictional boundaries.

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