POAMOHO — NGS TU1512 — Waipahu, US

NGS Triangulation Station, Hawaiian Islands Network This triangulation monument is part of the National Geodetic Survey's network, which establishes the foundational reference framework for surveying and mapping throughout the United States and its territories. Located near Waipahu on the island of Oahu, Hawaii, at coordinates 21.51333° N, 158.04068° W, this trig point serves as a control station for horizontal positioning. Triangulation stations of this type were established to provide surveyors and engineers with precise, monumented reference points for local and regional surveys. Such points remain valuable for verification of existing survey work, establishment of new surveys, and validation of modern positioning technologies. Documentation and recovery of benchmark stations is essential for maintaining geodetic infrastructure integrity. Surveyors undertaking work in this region should verify current mark condition and stability through NGS databases before use in critical applications.

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