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Convert ETRS89 to S-JTSK

Convert coordinates from ETRS89 (EPSG:4258) to S-JTSK (EPSG:4156) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4258-to-epsg-4156

Official EPSG transformation from ETRS89 to S-JTSK

The EPSG Geodetic Parameter Dataset defines 1 transformation between ETRS89 (EPSG:4258) and S-JTSK (EPSG:4156). Its parameters, accuracy and area of use are listed below.

ETRS89 to S-JTSK (5)

EPSG:8442±0.06 m
Method:
Concatenated operation
Area of use:
Slovakia
Scope:
Geodesy.
  1. ETRS89 to S-JTSK [JTSK03] (1) (null)
  2. S-JTSK [JTSK03] to S-JTSK (1) (null)

Recommended method of a transformation from ETRS89 to S-JTSK in Slovakia. For reverse transformation see S-JTSK to ETRS89 (6) (code 8443). Both together replace S-JTSK to ETRS89 (4) (code 4827).

Convert EPSG:4258 to EPSG:4156 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4258", "EPSG:4156", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4258 — ETRS89

geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - ETRF by country

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4258 →

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=crs
More about EPSG:4156 →

Frequently asked questions

How accurate is converting ETRS89 to S-JTSK?
The most accurate official EPSG transformation between these systems is accurate to about ±0.06 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:4156 to EPSG:4258 →