T 45 — NGS RD0615 — Vancouver, US

This triangulation station is part of the National Geodetic Survey's network of control points that establish the geometric framework for surveying and mapping across the United States. Located near Vancouver, Washington at coordinates 45.62361°N, 122.67444°W, this trig point serves as a reference for determining positions of other survey marks and geographic features with high precision. Triangulation stations of this type historically provided essential horizontal control across regions before the advent of satellite-based positioning systems. The point remains valuable for verification of legacy survey data, recovery of historical surveys, and as an independent check on modern positioning methods. Documentation and preservation of such benchmarks supports continuity in the national geodetic datum and aids surveyors conducting boundary work, engineering projects, and geographic research in the Pacific Northwest region.

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