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EPSG Library · WGS 84 / UTM zones (south)

EPSG:32728 — WGS 84 / UTM zone 28S

Source: EPSG Dataset via PROJ 9.5.1 · Updated

Summary

EPSG:32728 (WGS 84 / UTM zone 28S) is a projected coordinate reference system on the World Geodetic System 1984 ensemble datum using the Transverse Mercator method, with coordinates in metres. Area of use: Between 18°W and 12°W, southern hemisphere between 80°S and equator, onshore and offshore. The datum is an ensemble with about 2.0 m accuracy, so precise work should name a specific realization.

  • Type: projected
  • Datum: World Geodetic System 1984 ensemble
  • Units: metre
  • Axes: E, N
  • Central meridian: -15°

Definition

EPSG:32728 as published in the EPSG Dataset (PROJ 9.5.1).
PropertyValue
EPSG codeEPSG:32728
NameWGS 84 / UTM zone 28S
TypeProjected CRS
DatumWorld Geodetic System 1984 ensemble (ensemble, accuracy ≈ 2.0 m)
EllipsoidWGS 84 (a = 6,378,137.000 m, 1/f = 298.257224)
Prime meridianGreenwich
Projection methodTransverse Mercator
AxesEasting (E, east, metre); Northing (N, north, metre)
ScopeNavigation and medium accuracy spatial referencing.
Bounding box-18° to -12° longitude, -80° to 0° latitude

Area of use

Between 18°W and 12°W, southern hemisphere between 80°S and equator, onshore and offshore.

Projection parameters

Transverse Mercator parameters.
ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin-15degree
Scale factor at natural origin0.9996unity
False easting500,000metre
False northing10,000,000metre

Example coordinates

A WGS 84 point at longitude -13.5°, latitude -24.0° (inside the area of use) has these coordinates in EPSG:32728:

Computed with PROJ using the EPSG default operation: axis order change (2D) + UTM zone 28S.
AxisValueUnit
E652,578.355m
N7,344,960.983m

At this point the projection scale factor is 0.99988755 and the grid convergence is -0.610223°.

Open this conversion in the coordinate converter

Definitions and downloads

PROJ string

+proj=utm +zone=28 +south +datum=WGS84 +units=m +no_defs +type=crs

A PROJ string cannot carry every EPSG detail (axis order, datum ensemble, transformations). Prefer WKT2 or the EPSG code itself.

Proj4js definition used by the converter

+proj=utm +zone=28 +south +datum=WGS84 +units=m +no_defs

No datum shift is needed: this CRS is on WGS 84 or a datum Proj4js treats as equivalent at the metre level.

WKT2:2019
PROJCRS["WGS 84 / UTM zone 28S", BASEGEOGCRS["WGS 84", ENSEMBLE["World Geodetic System 1984 ensemble", MEMBER["World Geodetic System 1984 (Transit)"], MEMBER["World Geodetic System 1984 (G730)"], MEMBER["World Geodetic System 1984 (G873)"], MEMBER["World Geodetic System 1984 (G1150)"], MEMBER["World Geodetic System 1984 (G1674)"], MEMBER["World Geodetic System 1984 (G1762)"], MEMBER["World Geodetic System 1984 (G2139)"], MEMBER["World Geodetic System 1984 (G2296)"], ELLIPSOID["WGS 84",6378137,298.257223563, LENGTHUNIT["metre",1]], ENSEMBLEACCURACY[2.0]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4326]], CONVERSION["UTM zone 28S", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-15, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",10000000, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Navigation and medium accuracy spatial referencing."], AREA["Between 18°W and 12°W, southern hemisphere between 80°S and equator, onshore and offshore."], BBOX[-80,-18,0,-12]], ID["EPSG",32728]]

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FAQ

What is EPSG:32728?

EPSG:32728 (WGS 84 / UTM zone 28S) is a projected coordinate reference system on the World Geodetic System 1984 ensemble datum using the Transverse Mercator method, with coordinates in metres. Area of use: Between 18°W and 12°W, southern hemisphere between 80°S and equator, onshore and offshore. The datum is an ensemble with about 2.0 m accuracy, so precise work should name a specific realization.

Where can EPSG:32728 be used?

Its area of use is: Between 18°W and 12°W, southern hemisphere between 80°S and equator, onshore and offshore.

Is EPSG:32728 in metres or degrees?

EPSG:32728 is projected, so coordinates are easting and northing in metres, not degrees.

How do I convert EPSG:32728 to latitude and longitude?

Transform from EPSG:32728 to EPSG:4326 (WGS 84). In GeoCAD Bridge open the coordinate converter with EPSG:32728 preselected, enter easting and northing, and choose WGS 84 as the target.

What is the central meridian of EPSG:32728?

-15° (UTM zone 28), with a scale factor of 0.9996, false easting 500 000 m and false northing 10 000 000 m.

Coordinate systems

Articles

Tools

References

  1. IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_32728.
  2. PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:32728 — WGS 84 / UTM zone 28S.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/32728/