Skip to content
transform

Convert Old Hawaiian to NAD83

Convert coordinates from Old Hawaiian (EPSG:4135) to NAD83 (EPSG:4269) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4135-to-epsg-4269

Official EPSG transformations from Old Hawaiian to NAD83

The EPSG Geodetic Parameter Dataset defines 2 transformations between Old Hawaiian (EPSG:4135) and NAD83 (EPSG:4269). Each applies to a specific area — pick the one whose area of use covers your data.

Old Hawaiian to NAD83 (1)

EPSG:1454±0.2 mBest accuracy
Method:
NADCON
Area of use:
USA - Hawaii - onshore
Scope:
Transformation of coordinates at 0.2m level of accuracy.

Grid files: hawaii.lashawaii.los

Accuracy 0.2m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON converts from Old Hawaiian Datum but makes the transformation appear to be from NAD27.

Old Hawaiian to NAD83 (2)

EPSG:8561±0.2 m
Method:
NADCON5 (2D)
Area of use:
USA - Hawaii - onshore
Scope:
Geodesy.

Grid files: nadcon5.ohd.nad83_1986.hawaii.lat.trn.20160901.bnadcon5.ohd.nad83_1986.hawaii.lon.trn.20160901.b

Uses NADCON5 method which expects longitudes positive east in range 0-360°; EPSG source and target CRSs have longitudes positive east in range -180° to +180°.

Convert EPSG:4135 to EPSG:4269 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4135", "EPSG:4269", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4135 — Old Hawaiian

geographic system using latitude and longitude on an ellipsoid · Area of use: USA - Hawaii - onshore

+proj=longlat +ellps=clrk66 +towgs84=61,-285,-181,0,0,0,0 +no_defs +type=crs
More about EPSG:4135 →

Target: 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=crs
More about EPSG:4269 →

Frequently asked questions

How accurate is converting Old Hawaiian to NAD83?
The most accurate official EPSG transformation between these systems is accurate to about ±0.2 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:4269 to EPSG:4135 →