DR J — NGS DH9155 — Denver, US

This is a triangulation (trig) station within the NGS network that establishes foundational geodetic control across the United States. Located approximately 39.86581°N, 104.67437°W near Denver, Colorado, at an ellipsoidal elevation of 1615.8 meters, this point serves as a precise horizontal and vertical reference for surveying, mapping, and geospatial applications throughout the region. Trig stations of this type are historically significant components of the national geodetic framework, providing essential survey-grade coordinate data. The NGS network comprises thousands of such monumented points distributed nationwide, enabling surveyors, engineers, and cartographers to conduct accurate work with consistent coordinate systems. Verification and documentation of benchmark coordinates remains critical for maintaining geodetic infrastructure integrity. These reference points support infrastructure development, land surveying, GPS/GNSS validation, and scientific research. Regular confirmation of station stability and position accuracy helps preserve the reliability of measurements dependent upon this foundational control network.

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