LINCOLN — NGS RD1551 — Vancouver, US

This triangulation station is part of the National Geodetic Survey's horizontal control network, which establishes the fundamental geodetic framework for the United States. Positioned near Vancouver, Washington at coordinates 45.65351° N, 122.67592° W, this trig point serves as a reference monument for surveying and mapping activities in the Pacific Northwest region. Triangulation stations of this type were historically observed and used to create networks of known positions across the country. Such points provide surveyors, engineers, and mapping professionals with accurate control for boundary determination, infrastructure development, and geographic information systems. The NGS network remains an essential component of national surveying practice. Documentation and verification of benchmark locations—including coordinate confirmation, physical condition assessment, and accessibility notes—supports the continued utility of these reference points for the surveying community. Accurate geodetic control remains foundational to professional surveying work.

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