FIRST DISTRICT — NGS RD3122 — Vancouver, US

This triangulation station is part of the NGS network, which establishes the primary geodetic control framework for surveying and mapping activities throughout the United States. Located near Vancouver, Washington at coordinates 45.61496°N, 122.65184°W, this trig point serves as a reference station for precise horizontal positioning in the Pacific Northwest region. Triangulation stations of this classification function as vertices in networks of measured angles and distances, providing fundamental control for cadastral surveys, engineering projects, and geographic information systems. The point's documented coordinates enable surveyors and mappers to reference their local work to the national datum. Verification and maintenance of such benchmark stations remain essential for preserving the accuracy and continuity of surveying infrastructure. Professional documentation ensures that this reference point continues to serve its role in supporting land surveying operations and spatial data collection across the region.

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