Convert Malongo 1987 to RSAO13

Convert coordinates from Malongo 1987 (EPSG:4259) to RSAO13 (EPSG:8699) — 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-4259-to-epsg-8699

Official EPSG transformation from Malongo 1987 to RSAO13

The EPSG Geodetic Parameter Dataset defines 1 transformation between Malongo 1987 (EPSG:4259) and RSAO13 (EPSG:8699). Its parameters, accuracy and area of use are listed below.

Malongo 1987 to RSAO13 (1)

EPSG:9906±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Africa - Angola (Cabinda) and DR Congo (Zaire) - offshore
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-254.1	metre
Y-axis translation(ty)	-5.36	metre
Z-axis translation(tz)	-100.29	metre

Parameter values taken from Malongo 1987 to WGS 84 (2) (code 1557) assuming that RSAO13 is coincident with WGS 84 within the accuracy of the transformation. Equivalent to concatenation of EPSG:1557 and EPSG:8819.

Convert EPSG:4259 to EPSG:8699 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4259", "EPSG:8699", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4259 — Malongo 1987

geographic system using latitude and longitude on an ellipsoid · Area of use: Africa - Angola (Cabinda) and DR Congo (Zaire) - offshore

+proj=longlat +ellps=intl +towgs84=-254.1,-5.36,-100.29,0,0,0,0 +no_defs +type=crs

More about EPSG:4259 →

Target: EPSG:8699 — RSAO13

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

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:8699 →

Frequently asked questions

How accurate is converting Malongo 1987 to RSAO13?: The most accurate official EPSG transformation between these systems is accurate to about ±5 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:8699 to EPSG:4259 →