Source: EPSG:4903 — Madrid 1870 (Madrid)
geographic system using latitude and longitude on an ellipsoid · Area of use: Spain - mainland onshore
+proj=longlat +a=6378298.3 +rf=294.73 +pm=-3.687375 +no_defs +type=crsMore about EPSG:4903 →
Convert EPSG:4903 to EPSG:26911
Online coordinate converter from Madrid 1870 (Madrid) (EPSG:4903) to NAD83 / UTM zone 11N (EPSG:26911). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Convert EPSG:4903 to EPSG:26911 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4903", "EPSG:26911", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:26911 — NAD83 / UTM zone 11N
projected system measured in linear units (typically metres) · Area of use: North America - 120°W to 114°W and NAD83 by country
+proj=utm +zone=11 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crsMore about EPSG:26911 →
Frequently asked questions
- How accurate is converting Madrid 1870 (Madrid) to NAD83 / UTM zone 11N?
- 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.