11511 — NGS RD4245 — Vancouver, US

This triangulation station is part of the National Geodetic Survey network, which establishes and maintains the fundamental geodetic control framework for the United States. Located near Vancouver, Washington, at coordinates 45.62084° north latitude and 122.55450° west longitude, this trig point serves as a reference station for surveying and mapping activities throughout the region. Triangulation stations like this provide precise horizontal control for local surveys, engineering projects, and spatial data collection. The NGS network enables surveyors and geospatial professionals to tie their work to a consistent national coordinate system. Verification and documentation of such benchmarks remain important for maintaining data integrity and ensuring the accuracy of contemporary surveys that may reference these historical control points.

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