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Convert NAD83(CSRS)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height

Convert coordinates from NAD83(CSRS)v6 (EPSG:8251) to NAD83(CSRS)v6 + CGVD2013a(2010) height (EPSG:9544) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-8251-to-epsg-9544

Official EPSG transformation from NAD83(CSRS)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height

The EPSG Geodetic Parameter Dataset defines 1 transformation between NAD83(CSRS)v6 (EPSG:8251) and NAD83(CSRS)v6 + CGVD2013a(2010) height (EPSG:9544). Its parameters, accuracy and area of use are listed below.

NAD83(CSRS)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height (1)

EPSG:9644±0.03 m
Method:
Geog3D to Geog2D+GravityRelatedHeight (NRCan byn)
Area of use:
Canada
Scope:
Reversible geoid model transformation.

Grid file: CGG2013an83.byn

Reversible alternative to NAD83(CSRS)v6 to CGVD2013a(2010) height (1) (code 9247).

Convert EPSG:8251 to EPSG:9544 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:8251", "EPSG:9544", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:8251 — NAD83(CSRS)v6

geographic system using latitude, longitude and ellipsoidal height · Area of use: Canada

+proj=longlat +ellps=GRS80 +no_defs +type=crs
More about EPSG:8251 →

Target: EPSG:9544 — NAD83(CSRS)v6 + CGVD2013a(2010) height

compound horizontal + vertical reference system · Area of use: Canada

+proj=longlat +ellps=GRS80 +vunits=m +no_defs +type=crs
More about EPSG:9544 →

Frequently asked questions

How accurate is converting NAD83(CSRS)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height?
The most accurate official EPSG transformation between these systems is accurate to about ±0.03 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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:9544 to EPSG:8251 →