Source: EPSG:8251 — NAD83(CSRS)v6
geographic system using latitude, longitude and ellipsoidal height · Area of use: Canada
+proj=longlat +ellps=GRS80 +no_defs +type=crsMore about EPSG:8251 →
Convert EPSG:8251 to EPSG:8244
Online coordinate converter from NAD83(CSRS)v6 (EPSG:8251) to NAD83(CSRS)v4 (EPSG:8244). 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 NAD83(CSRS)v4 to NAD83(CSRS)v6 — the parameters are invertible.
Convert EPSG:8251 to EPSG:8244 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:8251", "EPSG:8244", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:8244 — NAD83(CSRS)v4
geographic system using latitude, longitude and ellipsoidal height · Area of use: Canada
+proj=longlat +ellps=GRS80 +no_defs +type=crsMore about EPSG:8244 →
Frequently asked questions
- How accurate is converting NAD83(CSRS)v6 to NAD83(CSRS)v4?
- 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.