Source: EPSG:5228 — S-JTSK/05
geographic system using latitude and longitude on an ellipsoid · Area of use: Czechia
+proj=longlat +ellps=bessel +towgs84=572.213,85.334,461.94,4.9732,1.529,5.2484,3.5378 +no_defs +type=crsMore about EPSG:5228 →
Convert EPSG:5228 to EPSG:4156
Online coordinate converter from S-JTSK/05 (EPSG:5228) to S-JTSK (EPSG:4156). 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 S-JTSK to S-JTSK/05 — the parameters are invertible.
Convert EPSG:5228 to EPSG:4156 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:5228", "EPSG:4156", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4156 — S-JTSK
geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - Czechoslovakia
+proj=longlat +ellps=bessel +towgs84=589,76,480,0,0,0,0 +no_defs +type=crsMore about EPSG:4156 →
Frequently asked questions
- How accurate is converting S-JTSK/05 to S-JTSK?
- 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.