BOUNDARY MARKER 4 — NGS TU1710 — Kapolei, US

This triangulation station is part of the NGS network, which maintains the geodetic control framework for surveying and mapping throughout the United States. Located near Kapolei on the island of Oahu, Hawaii, this trig point serves as a precise horizontal reference for regional surveys and spatial data collection. Triangulation stations of this type typically mark elevated positions selected for intervisibility with other control points, enabling surveyors to establish accurate positions across broader areas. The coordinates 21.40075°, -158.16992° define its horizontal location within the national spatial reference system. Verification and documentation of such monuments remain valuable for quality assurance in survey work, updating geographic information systems, and maintaining the integrity of Hawaii's geodetic infrastructure. Field professionals should consult current NGS records for any condition assessments or operational status updates before using this point.

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