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Convert S-JTSK [JTSK03] to S-JTSK

Convert coordinates from S-JTSK [JTSK03] (EPSG:8351) 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-8351-to-epsg-4156

Official EPSG transformation from S-JTSK [JTSK03] to S-JTSK

The EPSG Geodetic Parameter Dataset defines 1 transformation between S-JTSK [JTSK03] (EPSG:8351) and S-JTSK (EPSG:4156). Its parameters, accuracy and area of use are listed below.

S-JTSK [JTSK03] to S-JTSK (1)

EPSG:8364±0.05 m
Method:
NADCON
Area of use:
Slovakia
Scope:
Transformation of coordinates at 0.05m level of accuracy.

Grid files: Slovakia_JTSK03_to_JTSK.LASSlovakia_JTSK03_to_JTSK.LOS

Derived at 684 identical points. Also available as an NTv2 file.

Convert EPSG:8351 to EPSG:4156 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:8351", "EPSG:4156", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:8351 — S-JTSK [JTSK03]

geographic system using latitude and longitude on an ellipsoid · Area of use: Slovakia

+proj=longlat +ellps=bessel +towgs84=485.021,169.465,483.839,7.786342,4.397554,4.102655,0 +no_defs +type=crs
More about EPSG:8351 →

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 S-JTSK [JTSK03] to S-JTSK?
The most accurate official EPSG transformation between these systems is accurate to about ±0.05 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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:8351 →