Source: EPSG:4267 — NAD27
geographic system using latitude and longitude on an ellipsoid · Area of use: North America - NAD27
+proj=longlat +datum=NAD27 +no_defs +type=crsMore about EPSG:4267 →
Convert EPSG:4267 to EPSG:4259
Online coordinate converter from NAD27 (EPSG:4267) to Malongo 1987 (EPSG:4259). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:4267 to EPSG:4259 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4267", "EPSG:4259", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: 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=crsMore about EPSG:4259 →
Frequently asked questions
- How accurate is converting NAD27 to Malongo 1987?
- 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.