KEAWAULA ARMY — NGS TU1551 — Honolulu County, US

This trigonometric station is part of the National Geodetic Survey's network, which establishes the foundational control points for mapping and surveying throughout the United States. Located in Honolulu County, Hawaii, at coordinates 21.54854°N, 158.20867°W, this trig point serves as a reference station for horizontal control and network densification in the Hawaiian archipelago. Trig stations of this classification provide precise positional data essential for cadastral surveys, engineering projects, and maintaining spatial accuracy across regional and national datasets. The benchmark's integration into the NGS network enables surveyors and cartographers to establish consistent coordinate systems for local work. Documentation and periodic verification of such control points remain critical to geodetic infrastructure, ensuring the reliability and longevity of surveying networks that support both public and private sector applications across the islands.

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