Convert PSAD56 to WGS 84

Convert coordinates from PSAD56 (EPSG:4248) to WGS 84 (EPSG:4326) — 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-4248-to-epsg-4326

Official EPSG transformations from PSAD56 to WGS 84

The EPSG Geodetic Parameter Dataset defines 17 transformations between PSAD56 (EPSG:4248) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

PSAD56 to WGS 84 (11)

EPSG:1583±0.5 mBest accuracy

Method:: Geocentric translations (geog2D domain)
Area of use:: Bolivia - Block 20
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-307.7	metre
Y-axis translation(ty)	265.3	metre
Z-axis translation(tz)	-363.5	metre

Derived July 1997 by Geoid from data recorded by UGA for Total. OSU91A geoid model used.

PSAD56 to WGS 84 (10)

EPSG:1582±3 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Bolivia - Madidi
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-259.73	metre
Y-axis translation(ty)	173.12	metre
Z-axis translation(tz)	-398.27	metre

Derived May 1995 by Geoid for Total. OSU91A geoid model used.

PSAD56 to WGS 84 (14)

EPSG:3990±5 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Ecuador - mainland onshore
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.

Parameter	Value	Unit
X-axis translation(tx)	-60.31	metre
Y-axis translation(ty)	245.935	metre
Z-axis translation(tz)	31.008	metre
X-axis rotation(rx)	-12.324	arc-second
Y-axis rotation(ry)	-3.755	arc-second
Z-axis rotation(rz)	7.37	arc-second
Scale difference(ds)	0.447	parts per million

Parameter values from PSAD56 to SIRGAS 1995 (1) (code 3971). Assumes SIRGAS 1995 and WGS 84 can be considered the same to within the accuracy of the transformation.

PSAD56 to WGS 84 (6)

EPSG:1206±7 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Ecuador - mainland onshore
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-278	metre
Y-axis translation(ty)	171	metre
Z-axis translation(tz)	-367	metre

Derived at 11 stations. Accuracy 3m, 5m and 3m in X, Y and Z axes.

PSAD56 to WGS 84 (13)

EPSG:1095±15 m

Method:: Molodensky-Badekas (CF geog2D domain)
Area of use:: Venezuela - onshore
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.

Parameter	Value	Unit
X-axis translation(tx)	-270.933	metre
Y-axis translation(ty)	115.599	metre
Z-axis translation(tz)	-360.226	metre
X-axis rotation(rx)	-5.266	arc-second
Y-axis rotation(ry)	-1.238	arc-second
Z-axis rotation(rz)	2.381	arc-second
Scale difference(ds)	-5.109	parts per million
Pivot X(px)	2464351.59	metre
Pivot Y(py)	-5783466.61	metre
Pivot Z(pz)	974809.81	metre

Parameter values are from PSAD56 to REGVEN (1) (code 1769) assuming that REGVEN is equivalent to WGS 84 within the accuracy of the transformation.

PSAD56 to WGS 84 (8)

EPSG:1208±16 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Peru - onshore
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-279	metre
Y-axis translation(ty)	175	metre
Z-axis translation(tz)	-379	metre

Derived at 6 stations. Accuracy 6m, 8m and 12m in X, Y and Z axes.

PSAD56 to WGS 84 (7)

EPSG:1207±17 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Guyana
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-298	metre
Y-axis translation(ty)	159	metre
Z-axis translation(tz)	-369	metre

Derived at 9 stations. Accuracy 6m, 14m and 5m in X, Y and Z axes.

PSAD56 to WGS 84 (15)

EPSG:6971±17 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Chile - onshore north of 26°S
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-302	metre
Y-axis translation(ty)	272	metre
Z-axis translation(tz)	-360	metre

Derived at 5 stations. Accuracy 10m in each axis. Replaces PSAD56 to WGS 84 (3) (code 1203). Also used as a transformation from PSAD56 to SIRGAS-Chile - see code 6949.

PSAD56 to WGS 84 (16)

EPSG:6972±17 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Chile - onshore 26°S to 36°S
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-328	metre
Y-axis translation(ty)	340	metre
Z-axis translation(tz)	-329	metre

Derived at 7 stations. Accuracy 10m in each axis. Also used as a transformation from PSAD56 to SIRGAS-Chile - see code 6950.

PSAD56 to WGS 84 (17)

EPSG:6973±17 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Chile - onshore 36°S to 43.5°S
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-352	metre
Y-axis translation(ty)	403	metre
Z-axis translation(tz)	-287	metre

Derived at 6 stations. Accuracy 10m in each axis. Replaces PSAD56 to WGS 84 (4) (code 1204). Info source gives S limit as 44°S but Chilean IGM states that PSAD56 limit is 43°30'S. Also used as a transformation from PSAD56 to SIRGAS-Chile - see code 6951.

PSAD56 to WGS 84 (2)

EPSG:1202±19 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Bolivia
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-270	metre
Y-axis translation(ty)	188	metre
Z-axis translation(tz)	-388	metre

Derived at 5 stations. Accuracy 5m, 11m and 14m in X, Y and Z axes.

PSAD56 to WGS 84 (9)

EPSG:1209±23 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Venezuela - onshore
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-295	metre
Y-axis translation(ty)	173	metre
Z-axis translation(tz)	-371	metre

Derived at 24 stations. Accuracy 9m, 14m and 15m in X, Y and Z axes.

PSAD56 to WGS 84 (5)

EPSG:1205±26 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Colombia - mainland
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-282	metre
Y-axis translation(ty)	169	metre
Z-axis translation(tz)	-371	metre

Derived at 4 stations. Accuracy 15m in each axis. Note that although the PSAD56 network included Colombia the CRS is not used there: see Bogota 1975 (CRS code 4218).

PSAD56 to WGS 84 (4)

EPSG:1204±35 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Chile - onshore 39°S to 43°30'S
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-305	metre
Y-axis translation(ty)	243	metre
Z-axis translation(tz)	-442	metre

Derived at 3 stations. Accuracy 20m in each axis. Replaced by PSAD56 to WGS 84 (17) (code 6973).

PSAD56 to WGS 84 (1)

EPSG:1201±42 m

Method:: Geocentric translations (geog2D domain)
Area of use:: South America - Bolivia; Chile; Ecuador; Guyana; Peru; Venezuela
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-288	metre
Y-axis translation(ty)	175	metre
Z-axis translation(tz)	-376	metre

Derived at 63 stations. Accuracy 17m, 27m and 27m in X, Y and Z axes. DMA also lists Colombia as area of applicability but PSAD56 is not used in that country.

PSAD56 to WGS 84 (3)

EPSG:1203±44 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Chile - onshore north of 21°30'S
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-270	metre
Y-axis translation(ty)	183	metre
Z-axis translation(tz)	-390	metre

Derived at 1 station. Accuracy 25m in each axis. Replaced by PSAD56 to WGS 84 (15) (code 6971).

Convert EPSG:4248 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4248", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4248 — PSAD56

geographic system using latitude and longitude on an ellipsoid · Area of use: South America - PSAD56 by country

+proj=longlat +ellps=intl +no_defs +type=crs

More about EPSG:4248 →

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 PSAD56 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±0.5 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:4248 →

Parameter	Value	Unit
X-axis translation(tx)	-291.87	metre
Y-axis translation(ty)	106.37	metre
Z-axis translation(tz)	-364.52	metre