B 115 — NGS JC0099 — Dupo, US
USNGStrigunknown#7197
Latitude
38.522778°
Longitude
-90.209167°
Ortho h
125.52 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' geodetic infrastructure. Located near Dupo, Illinois, at coordinates 38.52278° N, 90.20917° W, this trig point serves as a reference for surveying and mapping activities across the region.
Triangulation stations like this one provide high-accuracy horizontal control for surveyors, engineers, and cartographers. They enable precise measurement of distances and angles necessary for property boundary establishment, construction projects, and geographic information systems.
The NGS maintains records of thousands of such points nationwide, documenting their positions relative to the National Spatial Reference System. Verification and documentation of existing control points remain essential for preserving survey accuracy and ensuring consistency in professional surveying practice. This benchmark contributes to the spatial framework supporting land administration and infrastructure development in Illinois.
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