E 407 — NGS KK1509 — Aurora, US

This triangulation station is part of the National Geodetic Survey's classical horizontal control network, which establishes the foundational reference framework for surveying and mapping throughout the United States. Located near Aurora, Colorado at coordinates 39.68222°, -104.81039°, this trig point served as a primary or secondary station in triangulation campaigns that connected regional survey networks across the country. Trigonometric stations of this type were established to provide surveyors with monumented reference points of known horizontal position, enabling accurate boundary surveys, engineering projects, and cartographic work. The point's documented location in the NGS database contributes essential historical data for the nation's geodetic infrastructure. Modern surveyors benefit from verifying and documenting such established benchmarks, as they provide continuity with legacy surveys and support quality assurance in contemporary positioning work.

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