Convert EPSG:8734 to EPSG:4322

Online coordinate converter from NAD83 / Illinois West (ftUS) + NAVD88 height (ftUS) (EPSG:8734) to WGS 72 (EPSG:4322). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.

From

Input (x, y)

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-8734-to-epsg-4322

Convert EPSG:8734 to EPSG:4322 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:8734", "EPSG:4322", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:8734 — NAD83 / Illinois West (ftUS) + NAVD88 height (ftUS)

compound horizontal + vertical reference system · Area of use: USA - Illinois - SPCS - W

+proj=tmerc +lat_0=36.6666666666667 +lon_0=-90.1666666666667 +k=0.999941177 +x_0=699999.99998984 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=us-ft +vunits=us-ft +no_defs +type=crs

More about EPSG:8734 →

Target: EPSG:4322 — WGS 72

geographic system using latitude and longitude on an ellipsoid · Area of use: World

+proj=longlat +ellps=WGS72 +no_defs +type=crs

More about EPSG:4322 →

Frequently asked questions

How accurate is converting NAD83 / Illinois West (ftUS) + NAVD88 height (ftUS) to WGS 72?: Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift transformation in a desktop GIS.
Does my data leave the browser when I use this converter?: No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.

Need the reverse? Convert EPSG:4322 to EPSG:8734 →