Convert coordinates from St. Helena Tritan (EPSG:7881) to SHGD2015 (EPSG:7886) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 1 transformation between St. Helena Tritan (EPSG:7881) and SHGD2015 (EPSG:7886). Its parameters, accuracy and area of use are listed below.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -0.077 | metre |
| Y-axis translation(ty) | 0.079 | metre |
| Z-axis translation(tz) | 0.086 | metre |
Derived at 19 stations, RMS = 5cm. May be used as an approximate transformation to WGS 84 - see code 7898.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:7881", "EPSG:7886", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)geographic system using latitude and longitude on an ellipsoid · Area of use: St Helena - St Helena Island
+proj=longlat +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +no_defs +type=crsMore about EPSG:7881 →
geographic system using latitude and longitude on an ellipsoid · Area of use: St Helena - St Helena Island
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crsMore about EPSG:7886 →