Source: EPSG:4740 — PZ-90
geographic system using latitude and longitude on an ellipsoid · Area of use: World
+proj=longlat +a=6378136 +rf=298.257839303 +towgs84=0,0,1.5,0,0,0.076,0 +no_defs +type=crsMore about EPSG:4740 →
Convert EPSG:4740 to EPSG:4284
Online coordinate converter from PZ-90 (EPSG:4740) to Pulkovo 1942 (EPSG:4284). 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 Pulkovo 1942 to PZ-90 — the parameters are invertible.
Convert EPSG:4740 to EPSG:4284 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4740", "EPSG:4284", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4284 — Pulkovo 1942
geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - FSU onshore
+proj=longlat +ellps=krass +towgs84=25,-141,-78.5,0,0.35,0.736,0 +no_defs +type=crsMore about EPSG:4284 →
Frequently asked questions
- How accurate is converting PZ-90 to Pulkovo 1942?
- 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.