Source: EPSG:7406 — NAD27 + NGVD29 height (ftUS)
compound horizontal + vertical reference system · Area of use: USA - CONUS - onshore
+proj=longlat +datum=NAD27 +vunits=us-ft +no_defs +type=crsMore about EPSG:7406 →
Convert EPSG:7406 to EPSG:4267
Online coordinate converter from NAD27 + NGVD29 height (ftUS) (EPSG:7406) to NAD27 (EPSG:4267). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:7406 to EPSG:4267 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:7406", "EPSG:4267", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4267 — NAD27
geographic system using latitude and longitude on an ellipsoid · Area of use: North America - NAD27
+proj=longlat +datum=NAD27 +no_defs +type=crsMore about EPSG:4267 →
Frequently asked questions
- How accurate is converting NAD27 + NGVD29 height (ftUS) to NAD27?
- 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.