EPSG systems

EPSG:2065 S-JTSK (Ferro) / Krovak

Projected system (Krovak) in use: Europe - Czechoslovakia. The full definition below, and conversion in one click.

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

System record
CodeEPSG:2065
NameS-JTSK (Ferro) / Krovak
TypeProjected system — Krovak
Area of use Europe - Czechoslovakia
Czechia; Slovakia.
Bounds W 12,09° · S 47,73° · E 22,56° · N 51,06°
Countries Czechia, Slovakia
DatumSystem of the Unified Trigonometrical Cadastral Network (Ferro)
Ellipsoid Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128
Prime meridianFerro -17.666666666666668 degree
Base geographic system EPSG:4818 — S-JTSK (Ferro)
Unit metre (X south, Y west)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeCadastre in Czechia.

Projection parameters

ParameterValueUnit
Latitude of projection centre49.5degree
Longitude of origin42.5degree
Co-latitude of cone axis30.28813975277778degree
Latitude of pseudo standard parallel78.5degree
Scale factor on pseudo standard parallel0.9999unity
False easting0metre
False northing0metre

proj4 definition

+proj=krovak +axis=swu +lat_0=49.5 +lon_0=42.5 +alpha=30.2881397527778 +k=0.9999 +x_0=0 +y_0=0 +ellps=bessel +pm=ferro +units=m +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:2065.

WKT (ESRI format, the .prj content)

PROJCS["S-JTSK_Ferro_Krovak",GEOGCS["GCS_S_JTSK_Ferro",DATUM["System_of_the_Unified_Trigonometrical_Cadastral_Network_(Ferro)",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Ferro",-17.6666666666667],UNIT["Degree",0.0174532925199433]],PROJECTION["Krovak"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Pseudo_Standard_Parallel_1",78.5],PARAMETER["Scale_Factor",0.9999],PARAMETER["Azimuth",30.2881397527778],PARAMETER["Longitude_Of_Center",42.5],PARAMETER["Latitude_Of_Center",49.5],PARAMETER["X_Scale",1.0],PARAMETER["Y_Scale",1.0],PARAMETER["XY_Plane_Rotation",0.0],UNIT["Meter",1.0]]

All systems — Czechia

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.