49 — NGS RD0486 — Portland, US

This trigonometric station is part of the National Geodetic Survey's network, which establishes and maintains the horizontal and vertical control framework for the United States. Trig stations serve as fundamental reference points for surveying, mapping, and engineering projects requiring precise geospatial positioning. Located near Portland, Oregon at coordinates 45.54000° N, 122.70389° W, this benchmark contributes to regional geodetic infrastructure. Such control points enable surveyors and engineers to reference their local measurements to the national datum system. Verification and documentation of these monuments remain essential for maintaining survey accuracy across generations of projects. The station's continued existence and accessibility support ongoing professional surveying activities and land administration in the Portland metropolitan area and surrounding regions.

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