EPSG:5224 S-JTSK/05 (Ferro) / Modified Krovak
Projected system (Krovak Modified) in use: Czechia. 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.
| Code | EPSG:5224 |
|---|---|
| Name | S-JTSK/05 (Ferro) / Modified Krovak |
| Type | Projected system — Krovak Modified |
| Area of use | Czechia |
| Bounds | W 12,09° · S 48,58° · E 18,86° · N 51,06° |
| Countries | Czechia |
| Datum | System of the Unified Trigonometrical Cadastral Network/05 (Ferro) |
| Ellipsoid | Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128 |
| Prime meridian | Ferro -17.666666666666668 degree |
| Base geographic system | EPSG:5229 — S-JTSK/05 (Ferro) |
| Unit | metre (X south, Y west) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of projection centre | 49.5 | degree |
| Longitude of origin | 42.5 | degree |
| Co-latitude of cone axis | 30.288139722222223 | degree |
| Latitude of pseudo standard parallel | 78.5 | degree |
| Scale factor on pseudo standard parallel | 0.9999 | unity |
| False easting | 5000000 | metre |
| False northing | 5000000 | metre |
proj4 definition
+proj=mod_krovak +axis=swu +lat_0=49.5 +lon_0=42.5 +alpha=30.2881397222222 +k=0.9999 +x_0=5000000 +y_0=5000000 +ellps=bessel +pm=ferro +units=m +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:5224.
Other systems — Czechia
- EPSG:3836Pulkovo 1942(83) / Gauss-Kruger zone 4
- EPSG:3838Pulkovo 1942(58) / 3-degree Gauss-Kruger zone 4
- EPSG:3841Pulkovo 1942(83) / 3-degree Gauss-Kruger zone 6
- EPSG:4156S-JTSK
- EPSG:4818S-JTSK (Ferro)
- EPSG:5221S-JTSK (Ferro) / Krovak East North
- EPSG:5225S-JTSK/05 (Ferro) / Modified Krovak East North
- EPSG:5228S-JTSK/05
- EPSG:5229S-JTSK/05 (Ferro)
- EPSG:5513S-JTSK / Krovak
- EPSG:5514S-JTSK / Krovak East North
- EPSG:5515S-JTSK/05 / Modified Krovak
- EPSG:5516S-JTSK/05 / Modified Krovak East North
- EPSG:5671Pulkovo 1942(58) / 3-degree Gauss-Kruger zone 4 (E-N)
- EPSG:5674Pulkovo 1942(83) / 3-degree Gauss-Kruger zone 4 (E-N)
- EPSG:5675Pulkovo 1942(83) / 3-degree Gauss-Kruger zone 5 (E-N)
- EPSG:8042Gusterberg (Ferro)
- EPSG:8043St. Stephen (Ferro)
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.