Source: EPSG:4269 — NAD83
geographic system using latitude and longitude on an ellipsoid · Area of use: North America - NAD83
+proj=longlat +datum=NAD83 +no_defs +type=crsMore about EPSG:4269 →
Convert EPSG:4269 to EPSG:21021
Online coordinate converter from NAD83 (EPSG:4269) to GSK-2011 / Gauss-Kruger CM 123E (EPSG:21021). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:4269 to EPSG:21021 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4269", "EPSG:21021", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:21021 — GSK-2011 / Gauss-Kruger CM 123E
projected system measured in linear units (typically metres) · Area of use: Russia - 120°E to 126°E onshore
+proj=tmerc +lat_0=0 +lon_0=123 +k=1 +x_0=500000 +y_0=0 +ellps=GSK2011 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crsMore about EPSG:21021 →
Frequently asked questions
- How accurate is converting NAD83 to GSK-2011 / Gauss-Kruger CM 123E?
- 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.