SMITH TOWER VANCOUVER — NGS RD4177

This trigonometric station is part of the National Geodetic Survey's network of control points that form the foundation of the United States' geodetic infrastructure. Located near Vancouver, Washington at coordinates 45.62543° N, 122.67242° W, this trig point serves as a reference for surveying, mapping, and engineering projects throughout the region. The ellipsoidal elevation is documented at 38.9 meters. As a trig station, this point was established to provide accurate horizontal and vertical control for subsequent surveys and geospatial work. The Pacific Northwest location places it within an area of significant development and infrastructure activity. Verification and maintenance of such benchmarks remain essential for ensuring the accuracy and reliability of all dependent surveying efforts, making periodic documentation and condition assessment valuable for the surveying and geodetic professional community.

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