Q 7 — NGS RD0630 — Vancouver, US

This triangulation station is part of the NGS network, which establishes the geometric foundation for surveying and mapping activities throughout the United States. Trig points serve as primary control stations for horizontal positioning, enabling surveyors and cartographers to reference their work to a consistent national geodetic datum. Located near Vancouver, Washington at coordinates 45.62944° N, 122.67139° W, this point occupies a strategic position within the Pacific Northwest geodetic framework. Trig stations of this classification typically occupy elevated or prominent locations to facilitate intervisibility with other control points across extended distances. Documentation and periodic verification of such benchmarks remain essential to maintaining survey accuracy and supporting infrastructure development, land administration, and scientific research. The coordinates and methodology associated with NGS-maintained stations provide reliable reference values for both historical and contemporary surveying applications.

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