F 533 — NGS RD1555 — Clark County, US

This triangulation station is part of the National Geodetic Survey's network, which establishes fundamental horizontal control across the United States. Located in Clark County, Washington at coordinates 45.69806°N, 122.65806°W, this trig point serves as a reference for precise surveying and mapping activities throughout the region. Triangulation stations of this type were historically observed and used to create accurate positional frameworks for subsequent surveys and development projects. Such control points remain valuable for verifying modern GPS observations, maintaining survey monument networks, and supporting engineering applications requiring reliable geodetic reference data. The presence of this benchmark in the NGS registry reflects its role in the national geodetic infrastructure. Surveyors and mapping professionals benefit from locating, documenting, and verifying such reference points to ensure accuracy in boundary work, construction staking, and geospatial analysis. Proper maintenance and verification of these monuments contributes to the integrity of survey networks across the region.

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