Convert Macao 1920 to WGS 84

Convert coordinates from Macao 1920 (EPSG:8428) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-8428-to-epsg-4326

Official EPSG transformation from Macao 1920 to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between Macao 1920 (EPSG:8428) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

Macao 1920 to WGS 84 (1)

EPSG:8438±1 m

Method:: Molodensky-Badekas (CF geog2D domain)
Area of use:: Macao
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-202.865	metre
Y-axis translation(ty)	-303.99	metre
Z-axis translation(tz)	-155.873	metre
X-axis rotation(rx)	-34.079	arc-second
Y-axis rotation(ry)	76.126	arc-second
Z-axis rotation(rz)	32.66	arc-second
Scale difference(ds)	6.096	parts per million
Pivot X(px)	-2361554.788	metre
Pivot Y(py)	5417536.177	metre
Pivot Z(pz)	2391608.926	metre

Derived from Macao 2008 to Macao 1920 (1) (code 8435) (reversed) assuming that Macao 2008 is equivalent to WGS 84 within the accuracy of the transformation. Some parameter values differ in the reverse due to the high rotations.

Convert EPSG:8428 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:8428", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:8428 — Macao 1920

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

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

More about EPSG:8428 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs

More about EPSG:4326 →

Frequently asked questions

How accurate is converting Macao 1920 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±1 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official 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:4326 to EPSG:8428 →