CRAIN — NGS AA3411 — Douglas County, US

This trigonometric station is part of the National Geodetic Survey's network of reference points that form the foundation of the United States' horizontal and vertical geodetic control infrastructure. Located in Douglas County, Colorado, at coordinates 39.56549° N, 104.78504° W with an ellipsoidal elevation of 1730.5 meters, this trig point serves as a monumented reference for surveying, mapping, and engineering projects throughout the region. Trig stations of this type are established at locations selected for visibility and stability, enabling surveyors and geodesists to conduct precise positional work and validate survey networks. Documentation and verification of such control points remain essential for maintaining the accuracy and integrity of geospatial data used in civil infrastructure, land administration, and scientific applications. Regular inspection of these monuments helps preserve critical reference information for current and future surveying operations.

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