Convert Timbalai 1948 to GDBD2009

Convert coordinates from Timbalai 1948 (EPSG:4298) to GDBD2009 (EPSG:5246) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4298-to-epsg-5246

Official EPSG transformation from Timbalai 1948 to GDBD2009

The EPSG Geodetic Parameter Dataset defines 1 transformation between Timbalai 1948 (EPSG:4298) and GDBD2009 (EPSG:5246). Its parameters, accuracy and area of use are listed below.

Timbalai 1948 to GDBD2009 (1)

EPSG:5878±1 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Brunei
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-689.5937	metre
Y-axis translation(ty)	623.84046	metre
Z-axis translation(tz)	-65.93566	metre
X-axis rotation(rx)	0.02331	arc-second
Y-axis rotation(ry)	-1.17094	arc-second
Z-axis rotation(rz)	0.80054	arc-second
Scale difference(ds)	5.88536	parts per million

May be taken as approximate transformation Timbalai 1948 to WGS 84 - see code 5249.

Convert EPSG:4298 to EPSG:5246 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4298", "EPSG:5246", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4298 — Timbalai 1948

geographic system using latitude and longitude on an ellipsoid · Area of use: Asia - Brunei and East Malaysia

+proj=longlat +ellps=evrstSS +towgs84=-679,669,-48,0,0,0,0 +no_defs +type=crs

More about EPSG:4298 →

Target: EPSG:5246 — GDBD2009

geographic system using latitude and longitude on an ellipsoid · Area of use: Brunei

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:5246 →

Frequently asked questions

How accurate is converting Timbalai 1948 to GDBD2009?: The most accurate official EPSG transformation between these systems is accurate to about ±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 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:5246 to EPSG:4298 →