PRES — NGS RD3281 — Portland, US

This triangulation station is part of the NGS geodetic network, which establishes the primary horizontal and vertical control framework for surveying and mapping across the United States. Located near Portland, Oregon at coordinates 45.55476° N, 122.64667° W, this trig point serves as a monumented reference station for precise positioning work. Triangulation stations function as fixed control points, enabling surveyors and engineers to accurately reference local surveys to the national geodetic datum. Such stations support infrastructure development, boundary establishment, and geospatial data collection across diverse applications. Documentation and verification of benchmark locations remain essential for maintaining the integrity of the national control network. Surveyors working in the Portland metropolitan area may utilize this point for establishing local survey networks and ensuring positional accuracy in their projects.

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