P248 — NGS DN4104 — Contra Costa County, US

This triangulation station is part of the National Geodetic Survey's network of reference points that form the foundation of the United States' horizontal and vertical geodetic control system. Located in Contra Costa County, California, at an ellipsoidal elevation of 230.4 meters, this trig point serves as a reference for surveying, mapping, and geographic information system applications across the region. Triangulation stations of this type were established to provide precise positional data for large-scale surveying projects and infrastructure development. The coordinates 37.97560°N, -121.86868°W define this point's location within the NGS framework. Verification and documentation of such control points remain essential for maintaining the accuracy and reliability of surveying work, ensuring consistency in cadastral records, engineering projects, and scientific research. Regular inspection of established benchmarks helps preserve the integrity of the nation's geodetic infrastructure.

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