Home / Landmarks / Southern Illinois Airport

Southern Illinois Airport Coordinates

IL, US · Elevation 125m

Quick answer: Southern Illinois Airport is located at 37.778099, -89.251999 (N, W).

Different tools require different formats — Garmin devices default to DDM, military maps use MGRS, topo maps use UTM, and web apps expect Decimal Degrees. Copy whichever format your device or application needs. Click any format abbreviation to learn how it works.

All Coordinate Formats

DD

Decimal Degrees

37.778099, -89.251999
DMS

Degrees Minutes Seconds

37°46'41.16"N 89°15'7.20"W
DDM

Degrees Decimal Minutes

37°46.6859'N 89°15.1199'W
UTM

Universal Transverse Mercator

16S 301673 4183583
MGRS

Military Grid Reference

16SCG0167383583
Geohash

Geohash Encoding

dn8wcj29m
Plus Code

Open Location Code

869GQPHX+65

Map Location

Map data © OpenStreetMap contributors

Antipodal Point

The point on the exact opposite side of Earth from Southern Illinois Airport. If you drilled straight through the planet's center, you would emerge here.

Antipodal coordinates

-37.778099, -89.251999

Hemisphere: S, W

DD

Decimal Degrees

-37.778099, -89.251999
DMS

Degrees Minutes Seconds

37°46'41.16"S 89°15'7.20"W
DDM

Degrees Decimal Minutes

37°46.6859'S 89°15.1199'W
UTM

Universal Transverse Mercator

16H 301673 5816417
MGRS

Military Grid Reference

16HCD0167316417
Geohash

Geohash Encoding

6129148wt
Plus Code

Open Location Code

46JG6PCX+JX

MGRS Decoded

MGRS encodes location as a nested hierarchy — zone, band, grid square, and offsets. Here is what each component of 16SCG0167383583 means.

Component Value Meaning
UTM Zone 16 One of 60 vertical slices of Earth (6° wide each). Zone 16 runs -90° to -84° longitude.
Latitude Band S One of 20 horizontal bands (8° tall each), lettered C–X (skipping I and O). Indicates the general latitude region.
100 km Square CG A 100 × 100 km grid square within the zone/band. Column letter C (west–east) and row letter G (south–north).
Easting 01673 Distance east within the 100 km square. 5-digit value = 10 m resolution. Multiply by 1 to get meters.
Northing 83583 Distance north within the 100 km square. Same resolution as easting (10 m).

Geohash Precision

A geohash encodes coordinates by subdividing the Earth into progressively smaller cells. Each extra character roughly halves the cell area. The table below shows Southern Illinois Airport's geohash at every precision level alongside the bounding box each level represents.

Length Geohash Cell Size
1
d
≈ 5,000 × 5,000 km
2
dn
≈ 1,250 × 625 km
3
dn8
≈ 156 × 156 km
4
dn8w
≈ 39 × 20 km
5
dn8wc
≈ 4.9 × 4.9 km
6
dn8wcj
≈ 1.2 km × 610 m
7
dn8wcj2
≈ 153 × 153 m
8
dn8wcj29
≈ 38 × 19 m
9
dn8wcj29m
≈ 4.8 × 4.8 m

Precision 9 (highlighted) is the default and provides sub-5-metre accuracy for most applications.

About Southern Illinois Airport

https://en.wikipedia.org/wiki/Southern_Illinois_Airport

Live Converter

The coordinates above are fixed to this landmark. Use this converter to enter any other coordinates — such as a nearby trailhead, parking area, or a location you want to compare — and get all 7 formats instantly.

DD

37.778099, -89.251999

DMS

37°46'41.16"N 89°15'7.20"W

DDM

37°46.6859'N 89°15.1199'W

UTM

16S 301673 4183583

MGRS

16SCG0167383583

GH

dn8wcj29m

OLC

869GQPHX+65

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