GRANITE CITY — NGS JC0154

This triangulation station is part of the NGS network, which comprises the foundational control points for the United States' geodetic reference system. Trig stations serve as primary vertices for surveying networks and provide precise positional control for mapping, engineering projects, and spatial data infrastructure. Located near Granite City, Illinois, at coordinates 38.70167° north latitude and 90.14722° west longitude, this benchmark contributes to regional horizontal control. As part of the national geodetic framework, this point supports cadastral surveys, construction layout, and geographic information systems across its vicinity. Verification and documentation of such stations remain essential for maintaining the integrity of the control network and ensuring continuity for future surveying operations. Professionals undertaking work in this area may reference this station for establishing local survey accuracy and datum connections.

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