Convert ITRF93 to ITRF94

Convert coordinates from ITRF93 (EPSG:4915) to ITRF94 (EPSG:4916) — 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-4915-to-epsg-4916

Official EPSG transformations from ITRF93 to ITRF94

The EPSG Geodetic Parameter Dataset defines 2 transformations between ITRF93 (EPSG:4915) and ITRF94 (EPSG:4916). Each applies to a specific area — pick the one whose area of use covers your data.

ITRF93 to ITRF94 (1)

EPSG:9025±0.01 mBest accuracy

Method:: Time-dependent Position Vector tfm (geocentric)
Area of use:: World
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	-0.6	centimetre
Y-axis translation(ty)	0.5	centimetre
Z-axis translation(tz)	1.5	centimetre
X-axis rotation(rx)	0.39	milliarc-second
Y-axis rotation(ry)	-0.8	milliarc-second
Z-axis rotation(rz)	0.96	milliarc-second
Scale difference(ds)	-0.4	parts per billion
rate tx	0.29	centimetres per year
rate ty	-0.04	centimetres per year
rate tz	-0.08	centimetres per year
rate rx	0.11	milliarc-seconds per year
rate ry	0.19	milliarc-seconds per year
rate rz	-0.05	milliarc-seconds per year
rate ds	0	parts per billion per year
epoch	1988	year

Scale difference in ppb and scale difference rate in ppb/yr where 1/billion = 1E-9 or nm/m. Superseded by parameter values derived from transformations to ITRF2020 (change in scale difference), see EPSG:10143.

ITRF93 to ITRF94 (2)

EPSG:10143±0.01 m

Method:: Time-dependent Position Vector tfm (geocentric)
Area of use:: World
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	-0.6	centimetre
Y-axis translation(ty)	0.5	centimetre
Z-axis translation(tz)	1.5	centimetre
X-axis rotation(rx)	0.39	milliarc-second
Y-axis rotation(ry)	-0.8	milliarc-second
Z-axis rotation(rz)	0.96	milliarc-second
Scale difference(ds)	-0.49	parts per billion
rate tx	0.29	centimetres per year
rate ty	-0.04	centimetres per year
rate tz	-0.08	centimetres per year
rate rx	0.11	milliarc-seconds per year
rate ry	0.19	milliarc-seconds per year
rate rz	-0.05	milliarc-seconds per year
rate ds	0	parts per billion per year
epoch	1988	year

Parameter values derived from differences in CTs to ITRF2020 (codes 9997 and 9998). These supersede all values published in past IERS/ITRF documentation (CT code 9025). Scale difference in ppb and scale difference rate in ppb/yr where 1/billion = 1E-9.

Convert EPSG:4915 to EPSG:4916 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4915", "EPSG:4916", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4915 — ITRF93

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

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

More about EPSG:4915 →

Target: EPSG:4916 — ITRF94

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

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

More about EPSG:4916 →

Frequently asked questions

How accurate is converting ITRF93 to ITRF94?: The most accurate official EPSG transformation between these systems is accurate to about ±0.01 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:4916 to EPSG:4915 →