CPS A — NGS AJ8307 — Cahokia, US
USNGStrigunknown#7000
Latitude
38.567070°
Longitude
-90.146865°
Ellipsoidal h
91.83 m
Ortho h
122.72 m
Verifications
0
Last checked
Never
This triangulation station is part of the National Geodetic Survey's network of control points that form the foundation of the United States' surveying and mapping infrastructure. Located near Cahokia, Illinois, this trig point serves as a precisely positioned reference for establishing accurate horizontal and vertical control across the region. The ellipsoidal elevation of 91.8 meters provides vertical reference data essential for engineering projects, land surveying, and geographic information systems. Trig stations like this enable surveyors to tie local measurements to the national coordinate system with confidence. The NGS network represents decades of systematic geodetic work, and verifying the continued existence and accuracy of such monuments remains important for maintaining survey integrity and supporting infrastructure development and maintenance across the nation.
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