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Convert CSRN epoch 2025.0 (NAD83 2011) to CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height

Convert coordinates from CSRN epoch 2025.0 (NAD83 2011) (EPSG:10909) to CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height (EPSG:10920) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-10909-to-epsg-10920

Official EPSG transformation from CSRN epoch 2025.0 (NAD83 2011) to CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height

The EPSG Geodetic Parameter Dataset defines 1 transformation between CSRN epoch 2025.0 (NAD83 2011) (EPSG:10909) and CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height (EPSG:10920). Its parameters, accuracy and area of use are listed below.

CSRN2025 (NAD83 2011) to CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height (3)

EPSG:10928±0.015 m
Method:
Geog3D to Geog2D+GravityRelatedHeight (NGS bin)
Area of use:
USA - California
Scope:
Reversible geoid model transformation.

Grid file: g2018u0.bin

Reversible alternative to CSRN2025 (NAD83 2011) (3) (code 10927). Uses NGS Geoid18 hybrid model. Note: this is an approximation to the operation pipeline implemented in SCIPv1 (code 10929) in which step 1 converts CSRN2025 (NAD83 2011) coordinates from epoch 2025.00 to epoch 2010.00, and step 2 uses the epoch 2010 horizontal coordinate values to interpolate the hybrid geoid model. The horizontal offset between CSRN2025 (NAD83 2011) at epoch 2025.00 and the Geoid18 model epoch of 2010.00 is approximately 0.5m and is not significant for the interpolation of the geoid model.

Convert EPSG:10909 to EPSG:10920 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:10909", "EPSG:10920", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:10909 — CSRN epoch 2025.0 (NAD83 2011)

geographic system using latitude, longitude and ellipsoidal height · Area of use: USA - California

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:10909 →

Target: EPSG:10920 — CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height

compound horizontal + vertical reference system · Area of use: USA - California

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +geoidgrids=us_noaa_g2018u0.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crs
More about EPSG:10920 →

Frequently asked questions

How accurate is converting CSRN epoch 2025.0 (NAD83 2011) to CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height?
The most accurate official EPSG transformation between these systems is accurate to about ±0.015 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:10920 to EPSG:10909 →