B 18 — NGS RD2858 — Vancouver, US

This trigonometric station is part of the NGS network, which establishes and maintains the fundamental geodetic control framework for the United States. Trig stations serve as precise reference points for surveying, mapping, and engineering projects across regional and national scales. Located near Vancouver, Washington at coordinates 45.62301°N, 122.58268°W, this benchmark contributes to the Pacific Northwest's horizontal control network. Such points enable surveyors and engineers to tie local work to a consistent national datum, ensuring spatial accuracy and consistency across jurisdictional boundaries. The documented geographic position of this station provides essential reference data for boundary surveys, construction projects, and geographic information systems. Verification and maintenance of existing benchmarks preserve critical infrastructure for accurate surveying practice and long-term spatial data reliability in the region.

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