T 135 — NGS ME1802 — Chicago, US

USNGStrigunknown#215533
Latitude
41.812778°
Longitude
-87.699167°
Ortho h
181.58 m
Verifications
0
Last checked
Never
This triangulation station is part of the National Geodetic Survey's network, which establishes the geometric framework for surveying and mapping throughout the United States. Located near Chicago, Illinois, at coordinates 41.81278° North, 87.69917° West, this trig point serves as a reference monument for horizontal control. Triangulation stations of this type have historically provided the foundational control network upon which subsequent surveys, property boundaries, and infrastructure projects depend. The point's documented geographic position enables surveyors and engineers to tie local surveys to the national datum and ensures consistency across surveying work. Verification and documentation of such benchmarks remain important for maintaining survey integrity and supporting large-scale mapping initiatives. The preservation of these reference points and their coordinate data supports ongoing professional surveying activities across the region.

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T 135 — NGS ME1802 — Chicago, US is a triangulation station located in United States, catalogued in the US NGS dataset. The point has been assigned the stable identifier #215533 on SurveyingPedia and sits at an approximate elevation of 181.6 metres. Its coordinates in WGS84 are 41.812778°, -87.699167°, corresponding to 41° 48′ 46.00″ N, 87° 41′ 57.00″ 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 T 135 — NGS ME1802 — Chicago, 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)41.812778, -87.699167
WGS84 (DMS)41° 48′ 46.00″ N, 87° 41′ 57.00″ W
UTM zone (approx.)Zone 16N (approx.)
Elevation181.58 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
352 — NGS ME1796 — Chicago, US
0.5 km away · US
US NGS · triangulation station
U 135 — NGS ME1795 — Chicago, US
0.6 km away · US
US NGS · triangulation station
047 COC — NGS ME2750 — Chicago, US
0.7 km away · US
US NGS · triangulation station
S 135 — NGS ME1803 — Chicago, US
0.8 km away · US
US NGS · triangulation station
KELLY — NGS ME2746 — Chicago, US
0.9 km away · US
US NGS · triangulation station
CHICAGO POLICE RAD TWR — NGS ME2748
1.1 km away · US

Frequently asked questions

What is T 135 — NGS ME1802 — Chicago, US?

T 135 — NGS ME1802 — Chicago, US is a triangulation station located in United States, catalogued in the US NGS network. It has the public identifier #215533 and sits at an elevation of 181.6 metres. The point is used for geodetic reference, topographic surveys, and related measurement workflows.

Where are the exact coordinates of T 135 — NGS ME1802 — Chicago, US?

The position of T 135 — NGS ME1802 — Chicago, US in WGS84 is 41.812778°, -87.699167° (decimal), or 41° 48′ 46.00″ N, 87° 41′ 57.00″ W in degrees-minutes-seconds. For planar surveys in United States this falls approximately in UTM Zone 16N (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.