WHITMORE MIL RES DOUBLE TANK — NGS TU1509 — Waipahu, US

This triangulation station is part of the National Geodetic Survey's network of control points distributed across the United States and its territories. Positioned near Waipahu on the island of Oahu, Hawaii, this trig point serves as a reference for horizontal geodetic control in the Hawaiian archipelago. Triangulation stations of this type were historically established to create a framework for accurate surveying and mapping activities. The point's coordinates—21.54025° N, 158.01691° W—establish its precise location within the national coordinate system. For surveying professionals, such benchmarks provide essential verification stations for local surveys, construction projects, and mapping initiatives. Regular inspection and documentation of these control points remain valuable for maintaining the integrity of Hawaii's geodetic infrastructure and ensuring consistency across surveying operations in the region.

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