U 284 — NGS JC1143 — Cahokia, US

This triangulation station is part of the National Geodetic Survey's network of precisely positioned reference points that form the foundation of the United States' horizontal control infrastructure. Located near Cahokia, Illinois, this trig point was established to provide surveyors and engineers with reliable geodetic control for mapping, boundary determination, and construction projects throughout the region. Triangulation stations of this type were positioned at strategic locations to create interconnected networks enabling accurate position determination across large areas. The NGS designation indicates this point has been integrated into the national geodetic datum and documented in the permanent public registry. Verification and documentation of such benchmarks remain important for maintaining the integrity of surveying networks, supporting land records, and ensuring consistency in large-scale geospatial projects. This station contributes to the stable reference framework necessary for professional surveying and civil engineering work.

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