Source: 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 →
Convert EPSG:4267 to EPSG:7581
Online coordinate converter from NAD27 (EPSG:4267) to NAD83(2011) / WISCRS Washburn (m) (EPSG:7581). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:4267 to EPSG:7581 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4267", "EPSG:7581", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:7581 — NAD83(2011) / WISCRS Washburn (m)
projected system measured in linear units (typically metres) · Area of use: USA - Wisconsin - Washburn
+proj=lcc +lat_1=45.9612198333333 +lat_0=45.9612198333333 +lon_0=-91.7833333333333 +k_0=1.0000475376 +x_0=234086.8682 +y_0=188358.6058 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crsMore about EPSG:7581 →
Frequently asked questions
- How accurate is converting NAD27 to NAD83(2011) / WISCRS Washburn (m)?
- 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.