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Convert Timbalai 1948 to WGS 84

Convert coordinates from Timbalai 1948 (EPSG:4298) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4298-to-epsg-4326

Official EPSG transformations from Timbalai 1948 to WGS 84

The EPSG Geodetic Parameter Dataset defines 6 transformations between Timbalai 1948 (EPSG:4298) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Timbalai 1948 to WGS 84 (5)

EPSG:5249±1 mBest accuracy
Method:
Coordinate Frame rotation (geog2D domain)
Area of use:
Brunei
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
ParameterValueUnit
X-axis translation(tx)-689.5937metre
Y-axis translation(ty)623.84046metre
Z-axis translation(tz)-65.93566metre
X-axis rotation(rx)0.02331arc-second
Y-axis rotation(ry)-1.17094arc-second
Z-axis rotation(rz)0.80054arc-second
Scale difference(ds)5.88536parts per million

Parameter values taken from Timbalai 1948 to GDBD2009 (1) (code 5878) assuming that GDBD2009 is equivalent to WGS 84 within the accuracy of the transformation.

Timbalai 1948 to WGS 84 (2)

EPSG:1592±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Brunei
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-678metre
Y-axis translation(ty)670metre
Z-axis translation(tz)-48metre

Originally used by BSP offshore only, use extended to onshore in 2010.

Timbalai 1948 to WGS 84 (4)

EPSG:1852±5 m
Method:
Position Vector transformation (geog2D domain)
Area of use:
Malaysia - East Malaysia - offshore SCS
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-533.4metre
Y-axis translation(ty)669.2metre
Z-axis translation(tz)-52.5metre
X-axis rotation(rx)0arc-second
Y-axis rotation(ry)0arc-second
Z-axis rotation(rz)4.28arc-second
Scale difference(ds)9.4parts per million

Derived by Racal Survey for SSB at 24 coastal stations (including Timbalai fundamental point and 6 other primary triangulation stations) between in Sabah (Kudat southwards) and Sarawak (Sibu northwards).

Timbalai 1948 to WGS 84 (6)

EPSG:6902±6 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Brunei - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-679metre
Y-axis translation(ty)667metre
Z-axis translation(tz)-49metre

Derived at 9 stations. Accuracy 1m, 6m and 2m in X, Y and Z axes.

Timbalai 1948 to WGS 84 (1)

EPSG:1228±19 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Asia - Brunei and East Malaysia
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-679metre
Y-axis translation(ty)669metre
Z-axis translation(tz)-48metre

Derived at 8 stations. Accuracy 10m, 10m and 12m in X, Y and Z axes.

Timbalai 1948 to WGS 84 (3)

EPSG:1615±100 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Brunei - onshore
Scope:
Engineering survey, topographic mapping.
ParameterValueUnit
X-axis translation(tx)-726.282metre
Y-axis translation(ty)703.611metre
Z-axis translation(tz)-48.999metre

CARE! Erroneous GPS data was used in the derivation of these parameters. They produce a coordinate difference of 10m horizontally and 50m vertically compared to Timbalai 1948 to WGS 84 (2) (code 1592).

Convert EPSG:4298 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4298", "EPSG:4326", 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:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs
More about EPSG:4326 →

Frequently asked questions

How accurate is converting Timbalai 1948 to WGS 84?
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:4326 to EPSG:4298 →