51 — NGS RD0483 — Portland, US

This trigonometric station is part of the National Geodetic Survey's network, which establishes and maintains the fundamental geodetic control framework for the United States. Trig points serve as precisely positioned reference monuments used to support surveying, mapping, and engineering projects across local and regional scales. Located near Portland, Oregon at coordinates 45.54130° N, 122.69664° W, this station contributes to the spatial reference infrastructure of the Pacific Northwest region. The coordinates provided reflect the point's horizontal position within the national datum system. As a control point within the NGS network, this benchmark's documented location enables surveyors and mapping professionals to establish accurate local surveys and verify existing survey work. Regular verification and maintenance of such stations ensures the continued integrity of geodetic control data and supports ongoing surveying activities in the area.

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