Convert IGS08 to IGRS

Convert coordinates from IGS08 (EPSG:6934) to IGRS (EPSG:3887) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (x, y)

Output (x, y)

Direct link to this transformation: epsgtransform.com/transform/epsg-6934-to-epsg-3887

Official EPSG transformations from IGS08 to IGRS

The EPSG Geodetic Parameter Dataset defines 2 transformations between IGS08 (EPSG:6934) and IGRS (EPSG:3887). Each applies to a specific area — pick the one whose area of use covers your data.

IGS08 to IGRS (1)

EPSG:6935±0.05 mBest accuracy

Method:: Molodensky-Badekas (PV geocentric domain)
Area of use:: Iraq
Scope:: Geodesy, engineering survey, topographic mapping.

Parameter	Value	Unit
X-axis translation(tx)	0.208	metre
Y-axis translation(ty)	-0.012	metre
Z-axis translation(tz)	-0.229	metre
X-axis rotation(rx)	-0.01182	arc-second
Y-axis rotation(ry)	0.00811	arc-second
Z-axis rotation(rz)	-0.01677	arc-second
Scale difference(ds)	-0.0059	parts per million
Pivot X(px)	3777505.028	metre
Pivot Y(py)	3779254.396	metre
Pivot Z(pz)	3471111.632	metre

Derived by least squares adjustment from the coordinates of the IRAQ-CORS network in both CRSs. Station Baghdad was excluded (high residuals). RMSE = 0.004 m. Application yields identical results to transformation 6936.

IGS08 to IGRS (2)

EPSG:6936±0.05 m

Method:: Position Vector transformation (geocentric domain)
Area of use:: Iraq
Scope:: Geodesy, engineering survey, topographic mapping.

Parameter	Value	Unit
X-axis translation(tx)	-0.214	metre
Y-axis translation(ty)	0.119	metre
Z-axis translation(tz)	0.156	metre
X-axis rotation(rx)	-0.01182	arc-second
Y-axis rotation(ry)	0.00811	arc-second
Z-axis rotation(rz)	-0.01677	arc-second
Scale difference(ds)	-0.0059	parts per million

Convert EPSG:6934 to EPSG:3887 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:6934", "EPSG:3887", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:6934 — IGS08

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: World

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs

More about EPSG:6934 →

Target: EPSG:3887 — IGRS

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: Iraq

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs

More about EPSG:3887 →

Frequently asked questions

How accurate is converting IGS08 to IGRS?: The most accurate official EPSG transformation between these systems is accurate to about ±0.05 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:3887 to EPSG:6934 →