Source: EPSG:4657 — Reykjavik 1900
geographic system using latitude and longitude on an ellipsoid · Area of use: Iceland - mainland
+proj=longlat +a=6377019.27 +rf=300 +towgs84=-28,199,5,0,0,0,0 +no_defs +type=crsMore about EPSG:4657 →
Convert EPSG:4657 to EPSG:4978
Online coordinate converter from Reykjavik 1900 (EPSG:4657) to WGS 84 (EPSG:4978). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:4657 to EPSG:4978 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4657", "EPSG:4978", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4978 — WGS 84
geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: World
+proj=geocent +datum=WGS84 +units=m +no_defs +type=crsMore about EPSG:4978 →
Frequently asked questions
- How accurate is converting Reykjavik 1900 to WGS 84?
- 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.