RAIN GAUGE 1963 — NGS TU1578 — Honolulu County, US

This trigonometric station is part of the National Geodetic Survey's network, which provides the foundational control points for surveying and mapping activities throughout the United States. Located in Honolulu County, Hawaii, at coordinates 21.53861° N, 158.12281° W, this trig point serves as a horizontal reference marker for establishing accurate positions of subsequent survey work in the region. Trigonometric stations like this one are typically monumented points used in triangulation surveys to create networks of known positions. Such control points are essential for land surveying, mapping, engineering projects, and geospatial applications across Hawaii and the broader Pacific region. Verification and documentation of these geodetic monuments remain valuable for maintaining survey continuity, validating modern positioning technologies, and preserving institutional knowledge of Hawaii's surveyed control framework. The horizontal coordinates define this point's role within the broader NGS control network.

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