5 11 A — NGS TU0515 — Honolulu County, US

This trigonometric station is part of the National Geodetic Survey's network of fundamental control points, which establish the geometric framework for surveying and mapping activities throughout the United States. Trigonometric stations serve as horizontal control monuments, providing precise three-dimensional positions that support cadastral surveys, engineering projects, and cartographic efforts. Located in Honolulu County, Hawaii, this benchmark contributes to the geodetic infrastructure of the Hawaiian Islands. The coordinates 21.68778°N, 158.02222°W place the point in the broader Pacific region where accurate positioning supports both terrestrial and marine surveying applications. Documentation and verification of such control points remain essential for maintaining the integrity of the national spatial reference system. Surveyors and geodesists depend on these monuments to establish local surveys with known accuracy and to ensure consistency across projects spanning years or decades.

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