Source: EPSG:10690 — EUREF-FIN
geographic system using latitude and longitude on an ellipsoid · Area of use: Finland
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crsMore about EPSG:10690 →
Convert EPSG:10690 to EPSG:4123
Online coordinate converter from EUREF-FIN (EPSG:10690) to KKJ (EPSG:4123). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
The EPSG dataset defines official transformation parameters for the reverse direction. See KKJ to EUREF-FIN — the parameters are invertible.
Convert EPSG:10690 to EPSG:4123 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:10690", "EPSG:4123", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4123 — KKJ
geographic system using latitude and longitude on an ellipsoid · Area of use: Finland - onshore
+proj=longlat +ellps=intl +towgs84=-96.062,-82.428,-121.753,4.801,0.345,-1.376,1.496 +no_defs +type=crsMore about EPSG:4123 →
Frequently asked questions
- How accurate is converting EUREF-FIN to KKJ?
- 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.