VIEWPOINT — NGS AI3605 — Seattle, US

USNGStrigunknown#214355
Latitude
47.688020°
Longitude
-122.256124°
Ellipsoidal h
-14.94 m
Ortho h
8.80 m
Verifications
0
Last checked
Never
This is a triangulation station within the National Geodetic Survey's network, which forms the foundational control infrastructure for surveying and mapping throughout the United States. Trig stations serve as precisely located reference points established through classical triangulation methods, providing accurate positional and elevation data for subsequent surveys and engineering projects. Located in the Seattle, Washington area at coordinates 47.68802°N, -122.25612°W, this point is situated at an ellipsoidal elevation of -14.9 meters, indicating its position below the reference ellipsoid datum. Such benchmarks are essential for maintaining consistent spatial reference frameworks across regions and enabling surveyors, engineers, and planners to conduct accurate work. Regular verification and proper documentation of these control points ensures their continued utility in an evolving geospatial environment and supports critical infrastructure development and maintenance activities.

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VIEWPOINT — NGS AI3605 — Seattle, US is a triangulation station located in United States, catalogued in the US NGS dataset. The point has been assigned the stable identifier #214355 on SurveyingPedia and sits at an approximate elevation of 8.8 metres. Its coordinates in WGS84 are 47.688020°, -122.256124°, corresponding to 47° 41′ 16.87″ N, 122° 15′ 22.04″ 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 VIEWPOINT — NGS AI3605 — Seattle, 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)47.688020, -122.256124
WGS84 (DMS)47° 41′ 16.87″ N, 122° 15′ 22.04″ W
UTM zone (approx.)Zone 10N (approx.)
Elevation8.80 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
SEATTLE WEATHER CORS ARP — NGS AH7396
0.1 km away · US
US NGS · triangulation station
BLDG 1 — NGS SY1597 — Seattle, US
0.1 km away · US
US NGS · triangulation station
IVORY TIP — NGS SY1598 — Seattle, US
0.1 km away · US
US NGS · triangulation station
GPS ANTENNA BLDG 3 — NGS SY5707 — Seattle, US
0.2 km away · US
US NGS · triangulation station
PMEL MAGNETIC STATION — NGS AI3609 — Seattle, US
0.2 km away · US
US NGS · triangulation station
NORIX — NGS SY1596 — Seattle, US
0.2 km away · US

Frequently asked questions

What is VIEWPOINT — NGS AI3605 — Seattle, US?

VIEWPOINT — NGS AI3605 — Seattle, US is a triangulation station located in United States, catalogued in the US NGS network. It has the public identifier #214355 and sits at an elevation of 8.8 metres. The point is used for geodetic reference, topographic surveys, and related measurement workflows.

Where are the exact coordinates of VIEWPOINT — NGS AI3605 — Seattle, US?

The position of VIEWPOINT — NGS AI3605 — Seattle, US in WGS84 is 47.688020°, -122.256124° (decimal), or 47° 41′ 16.87″ N, 122° 15′ 22.04″ W in degrees-minutes-seconds. For planar surveys in United States this falls approximately in UTM Zone 10N (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.