Convert SIGD61 to CIGD11

Convert coordinates from SIGD61 (EPSG:4726) to CIGD11 (EPSG:6135) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4726-to-epsg-6135

Official EPSG transformation from SIGD61 to CIGD11

The EPSG Geodetic Parameter Dataset defines 1 transformation between SIGD61 (EPSG:4726) and CIGD11 (EPSG:6135). Its parameters, accuracy and area of use are listed below.

SIGD61 to CIGD11 (1)

EPSG:6137±0.15 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Cayman Islands - Little Cayman and Cayman Brac
Scope:: Transformation of coordinates at 0.15m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	8.853	metre
Y-axis translation(ty)	-52.644	metre
Z-axis translation(tz)	180.304	metre
X-axis rotation(rx)	0.393	arc-second
Y-axis rotation(ry)	2.323	arc-second
Z-axis rotation(rz)	-2.96	arc-second
Scale difference(ds)	-24.081	parts per million

May be taken as approximate transformation SIGD61 to WGS 84 - see code 6143.

Convert EPSG:4726 to EPSG:6135 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4726", "EPSG:6135", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4726 — SIGD61

geographic system using latitude and longitude on an ellipsoid · Area of use: Cayman Islands - Little Cayman and Cayman Brac

+proj=longlat +ellps=clrk66 +no_defs +type=crs

More about EPSG:4726 →

Target: EPSG:6135 — CIGD11

geographic system using latitude and longitude on an ellipsoid · Area of use: Cayman Islands

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:6135 →

Frequently asked questions

How accurate is converting SIGD61 to CIGD11?: The most accurate official EPSG transformation between these systems is accurate to about ±0.15 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official 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:6135 to EPSG:4726 →