Convert ITRF97 to NAD83(CSRS)v3

Convert coordinates from ITRF97 (EPSG:4918) to NAD83(CSRS)v3 (EPSG:8238) — 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-4918-to-epsg-8238

Official EPSG transformation from ITRF97 to NAD83(CSRS)v3

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF97 (EPSG:4918) and NAD83(CSRS)v3 (EPSG:8238). Its parameters, accuracy and area of use are listed below.

ITRF97 to NAD83(CSRS)v3 (1)

EPSG:8260±0 m

Method:: Time-dependent Position Vector tfm (geocentric)
Area of use:: Canada
Scope:: Geodesy. Defines NAD83(CSRS)v3.

Parameter	Value	Unit
X-axis translation(tx)	0.9889	metre
Y-axis translation(ty)	-1.9074	metre
Z-axis translation(tz)	-0.503	metre
X-axis rotation(rx)	-25.915	milliarc-second
Y-axis rotation(ry)	-9.426	milliarc-second
Z-axis rotation(rz)	-11.599	milliarc-second
Scale difference(ds)	-0.935	parts per billion
rate tx	0.0007	metres per year
rate ty	-0.0001	metres per year
rate tz	0.0019	metres per year
rate rx	-0.067	milliarc-seconds per year
rate ry	0.757	milliarc-seconds per year
rate rz	0.031	milliarc-seconds per year
rate ds	-0.192	parts per billion per year
epoch	1997	year

Concatenation of joint Canada-US transformation NAD83>ITRF96 (see tfm code 8259) and IGS value for ITRF96>ITRF97 transformation. Scale difference in ppb and scale difference rate in ppb/yr where 1/billion = 1E-9 or nm/m. See tfm 6865 for US equivalent.

Convert EPSG:4918 to EPSG:8238 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4918", "EPSG:8238", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4918 — ITRF97

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

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

More about EPSG:4918 →

Target: EPSG:8238 — NAD83(CSRS)v3

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

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

More about EPSG:8238 →

Frequently asked questions

How accurate is converting ITRF97 to NAD83(CSRS)v3?: The most accurate official EPSG transformation between these systems is accurate to about ±0 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:8238 to EPSG:4918 →