C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US

USNGStrigunknown#4171
Latitude
18.320410°
Longitude
-64.727327°
Ellipsoidal h
-34.77 m
Ortho h
7.47 m
Verifications
0
Last checked
Never
This triangulation station is part of the National Geodetic Survey's network, which establishes the horizontal and vertical control framework essential to surveying, mapping, and engineering projects throughout United States territory. Located in the Saint Thomas-Saint John District of the US Virgin Islands at coordinates 18.32041°N, 64.72733°W, this trig point serves as a precise reference for local and regional geodetic work. The negative ellipsoidal elevation of -34.8 meters indicates a subsurface or marine location relative to the WGS 84 ellipsoid. Trig stations of this classification provide fundamental control points that surveyors and cartographers reference when establishing local survey networks and validating spatial data accuracy. Documentation and periodic verification of such benchmarks remain critical for maintaining the integrity of the national geodetic infrastructure and ensuring consistency in surveying standards across distributed island territories.

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C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US is a triangulation station located in United States, catalogued in the US NGS dataset. The point has been assigned the stable identifier #4171 on SurveyingPedia and sits at an approximate elevation of 7.5 metres. Its coordinates in WGS84 are 18.320410°, -64.727327°, corresponding to 18° 19′ 13.48″ N, 64° 43′ 38.38″ W in the traditional degrees-minutes-seconds format. This page is a self-updating reference — all data is aggregated from public open sources and cross-checked periodically against the originating agency.

Professional surveyors, engineers, and topographers use points like C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US to anchor total-station traverses, verify GNSS/RTK solutions, calibrate levelling instruments, and validate survey deliverables against known coordinates. The record on this page is refreshed daily via automated pipelines that monitor the public sources for any updates, corrections, or status changes.

Coordinate formats

WGS84 (decimal)18.320410, -64.727327
WGS84 (DMS)18° 19′ 13.48″ N, 64° 43′ 38.38″ W
UTM zone (approx.)Zone 20N (approx.)
Elevation7.47 m
Precise conversionOpen in coordinate converter →

Geodetic context in United States

The national geodetic reference in United States is maintained by National Geodetic Survey (NGS). The active datum is NAD83(2011) / NATRF2022 (active). Coordinates shown on this page are expressed in WGS84 (ETRF/ITRF-compatible) which is directly usable in most modern GNSS receivers. For cadastral work in United States you may need to convert to the local datum using the Coordinate Hub.

Browse the full list of indexed control points in United States from the country page.

Nearby benchmarks

The closest 6 indexed control points within roughly 50 km of this location:

US NGS · triangulation station
DENVER — NGS DL3632 — Saint Thomas - Saint John District, US
0.2 km away · US
US NGS · triangulation station
975 1381 B — NGS DL3634 — Saint Thomas - Saint John District, US
0.3 km away · US
US NGS · triangulation station
975 1381 5 — NGS DL3635 — Saint Thomas - Saint John District, US
0.4 km away · US
US NGS · triangulation station
975 1381 A — NGS DL3636 — Saint Thomas - Saint John District, US
0.4 km away · US
US NGS · triangulation station
975 1381 C — NGS DL3637 — Saint Thomas - Saint John District, US
0.4 km away · US
US NGS · triangulation station
975 1381 2 — NGS DL3638 — Saint Thomas - Saint John District, US
0.5 km away · US

Frequently asked questions

What is C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US?

C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US is a triangulation station located in United States, catalogued in the US NGS network. It has the public identifier #4171 and sits at an elevation of 7.5 metres. The point is used for geodetic reference, topographic surveys, and related measurement workflows.

Where are the exact coordinates of C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US?

The position of C 1001 — NGS DL3633 — Saint Thomas - Saint John District, US in WGS84 is 18.320410°, -64.727327° (decimal), or 18° 19′ 13.48″ N, 64° 43′ 38.38″ W in degrees-minutes-seconds. For planar surveys in United States this falls approximately in UTM Zone 20N (approx.).

How can I reach and visit this triangulation station?

Use the satellite imagery above to see the surrounding area. You can open this location directly in Google Maps, Google Earth, Bing Maps, or OpenStreetMap using the buttons provided. Many geodetic points are accessible to the public; some are on protected or private land — check local regulations before any field visit. Always bring documentation or your credentials if you plan to use the marker for professional measurement.

Is this point verified and usable for professional surveying?

This record has been community-verified 0 times. Data quality depends on the source: NGS and official national agency points are typically centimetre-accurate, OpenStreetMap survey points are metre-accurate, and GeoNames topographic landmarks (peaks, hills) are reference-grade only. Always cross-reference with the original agency datasheet before using this point for cadastral, legal, or safety-critical work.

Original source: this record was imported from ngs_public. Always refer to the original datasheet for the most up-to-date and authoritative data.