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Convert EPSG:7877 to EPSG:3395

Online coordinate converter from Astro DOS 71 / SHLG71 (EPSG:7877) to WGS 84 / World Mercator (EPSG:3395). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.

Direct link to this transformation: epsgtransform.com/transform/epsg-7877-to-epsg-3395

Convert EPSG:7877 to EPSG:3395 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:7877", "EPSG:3395", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:7877 — Astro DOS 71 / SHLG71

projected system measured in linear units (typically metres) · Area of use: St Helena - St Helena Island

+proj=tmerc +lat_0=-15.9666666666667 +lon_0=-5.71666666666667 +k=1 +x_0=300000 +y_0=2000000 +ellps=intl +units=m +no_defs +type=crs
More about EPSG:7877 →

Target: EPSG:3395 — WGS 84 / World Mercator

projected system measured in linear units (typically metres) · Area of use: World - between 80°S and 84°N

+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs
More about EPSG:3395 →

Frequently asked questions

How accurate is converting Astro DOS 71 / SHLG71 to WGS 84 / World Mercator?
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.
Need the reverse? Convert EPSG:3395 to EPSG:7877 →