PORTLAND CUSTOMHOUSE DOME — NGS RD3202

This triangulation station is part of the NGS network, which establishes the foundational geodetic control for surveying and mapping activities throughout the United States. Located near Portland, Oregon, at coordinates 45.51860°, -122.67827°, this trig point serves as a reference for horizontal positioning in the Pacific Northwest region. Triangulation stations of this type were historically established to create a framework of precisely located points across the country. Such monuments facilitate accurate surveying, engineering projects, and cartographic work by providing known control points of verified position. Verification and documentation of existing geodetic benchmarks remain valuable for the surveying profession. Confirming the physical condition and accessibility of such points supports continued utility in contemporary positioning work and helps maintain the integrity of historical survey networks. This point contributes to the overall geodetic infrastructure supporting regional and national surveying applications.

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