N 1253 — NGS HT1856 — Oakland, US

This triangulation station is part of the NGS network, which establishes the fundamental geodetic framework for the United States. Trig stations serve as control points for surveying and mapping operations, positioned to enable precise horizontal positioning through triangulation methods. Located near Oakland, California, at coordinates 37.82139° N, 122.20722° W, this benchmark contributes to regional survey control in the San Francisco Bay Area. Trig stations of this type were historically occupied with theodolites to measure angles between distant points, creating networks of known positions. Documentation and verification of such control points remain valuable for surveyors, engineers, and geospatial professionals who rely on established reference positions for local surveys and mapping projects. Maintaining records of these stations, including their coordinates and accessibility, ensures continuity of the surveying infrastructure upon which land administration and development depend.

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