ARFA — NGS RD0349 — Portland, US

This triangulation station is part of the National Geodetic Survey's classical trig network, which forms a foundational component of the United States' horizontal control infrastructure. Located near Portland, Oregon at coordinates 45.55250° N, 122.57861° W, this point serves as a survey-grade reference for mapping, engineering projects, and geodetic work across the region. Triangulation stations of this type were historically observed and monumented to establish accurate horizontal positions for large-scale surveying efforts. As part of the NGS network, this benchmark contributes to the geometric framework supporting cadastral surveys, construction layout, and geospatial data collection. Verification and documentation of existing trig points remain valuable for the surveying community. Such monuments provide independent control for quality assurance in modern surveys and serve as heritage references for understanding historical geodetic work. Professionals conducting field surveys in this area may reference this station to validate their measurements and establish local control networks.

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