X 15 — NGS TU0511 — Honolulu County, US

This triangulation station is part of the National Geodetic Survey's trigonometric network, which forms a foundational component of the United States' geodetic infrastructure. Located in Honolulu County, Hawaii, this trig point serves as a reference marker for high-precision surveying and mapping activities across the Hawaiian Islands region. Triangulation stations of this type were established to provide accurate horizontal control for cadastral surveys, engineering projects, and cartographic work. The coordinates 21.69632°N, 157.99907°W place this benchmark in a strategically important area for Pacific operations and local surveying efforts. Documentation and verification of such control points remain essential for maintaining the integrity of the national spatial reference framework. Surveyors and geospatial professionals rely on these established positions for accurate field measurements and coordinate transformations. Current condition assessment and recovery of benchmark locations help preserve the long-term value of the NGS network throughout Hawaii and beyond.

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