NAD83 to NAD83(CSRS)v4 (9)
EPSG:9119±0.1 mBest accuracy- Method:
- NTv2
- Area of use:
- Canada - British Columbia - mainland
- Scope:
- Geodesy.
Grid file: BC_93_05.GSB
Derived through NAD83(CSRS)v4.
Convert NAD83 to NAD83(CSRS)v4
Convert coordinates from NAD83 (EPSG:4269) to NAD83(CSRS)v4 (EPSG:8246) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
Official EPSG transformations from NAD83 to NAD83(CSRS)v4
The EPSG Geodetic Parameter Dataset defines 2 transformations between NAD83 (EPSG:4269) and NAD83(CSRS)v4 (EPSG:8246). Each applies to a specific area — pick the one whose area of use covers your data.
NAD83 to NAD83(CSRS)v4 (3)
EPSG:9244±1.5 m- Method:
- NTv2
- Area of use:
- Canada - Alberta
- Scope:
- Transformation of coordinates at 1m to 2m level of accuracy.
Grid file: AB_CSRS.DAC
This gridded difference file AB_CSRS.DAC may need to be renamed to AB_CSRS.gsb or AB_CSRSV4.gsb to run in some software. Formats identical, but AB file is provincial fit only. Can be taken as an approximate transformation NAD83 to WGS 84 - see code 1702.
Convert EPSG:4269 to EPSG:8246 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4269", "EPSG:8246", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Source: EPSG:4269 — NAD83
geographic system using latitude and longitude on an ellipsoid · Area of use: North America - NAD83
+proj=longlat +datum=NAD83 +no_defs +type=crsMore about EPSG:4269 →
Target: EPSG:8246 — NAD83(CSRS)v4
geographic system using latitude and longitude on an ellipsoid · Area of use: Canada
+proj=longlat +ellps=GRS80 +no_defs +type=crsMore about EPSG:8246 →
Frequently asked questions
- How accurate is converting NAD83 to NAD83(CSRS)v4?
- The most accurate official EPSG transformation between these systems is accurate to about ±0.1 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.