EPSG Library · Global and web

EPSG:4267 — NAD27

Source: EPSG Dataset via PROJ 9.5.1 · Updated 2026-10-05

Summary

EPSG:4267 (NAD27) is a geographic 2D coordinate reference system on the North American Datum 1927 datum with coordinates in degrees. Area of use: North and central America: Antigua and Barbuda - onshore.

Type: geographic 2D
Datum: North American Datum 1927
Units: degree
Axes: Lat, Lon

Definition

EPSG:4267 as published in the EPSG Dataset (PROJ 9.5.1).
Property	Value
EPSG code	EPSG:4267
Name	NAD27
Type	Geographic 2d CRS
Datum	North American Datum 1927
Ellipsoid	Clarke 1866 (a = 6,378,206.400 m, 1/f = 294.978698)
Prime meridian	Greenwich
Axes	Geodetic latitude (Lat, north, degree); Geodetic longitude (Lon, east, degree)
Scope	Geodesy.
Bounding box	167.65° to -47.74° longitude, 7.15° to 83.17° latitude

Area of use

North and central America: Antigua and Barbuda - onshore. Bahamas - onshore plus offshore over internal continental shelf only. Belize - onshore. British Virgin Islands - onshore. Canada onshore - Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan and Yukon - plus offshore east coast. Cuba - onshore and offshore. El Salvador - onshore. Guatemala - onshore. Honduras - onshore. Panama - onshore. Puerto Rico - onshore. Mexico - onshore plus offshore east coast. Nicaragua - onshore. United States (USA) onshore and offshore - Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming - plus offshore . US Virgin Islands - onshore.

Example coordinates

A WGS 84 point at longitude -120.045°, latitude 45.16° (inside the area of use) has these coordinates in EPSG:4267:

Computed with PROJ using the EPSG default operation: unavailable until proj_trans is called.
Axis	Value	Unit
Longitude	-120.043899	°
Latitude	45.160178	°

Open this conversion in the coordinate converter

Transformations to WGS 84

Candidate operations from the EPSG Dataset, best first as ranked by PROJ.
Operation	Accuracy	Area of use
axis order change (2D) + NAD27 to WGS 84 (3) + axis order change (2D)	20 m	Canada - onshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon; offshore east coast west of 44°W and north of 40°N.
axis order change (2D) + NAD27 to WGS 84 (4) + axis order change (2D)	10 m	United States (USA) - CONUS onshore - Alabama; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming.
axis order change (2D) + NAD27 to WGS 84 (13) + axis order change (2D)	8 m	Canada - Northwest Territories; Nunavut; Saskatchewan.
axis order change (2D) + NAD27 to WGS 84 (6) + axis order change (2D)	7 m	United States (USA) - CONUS west of Mississippi River - onshore - excludes those states covered under Area 2389 - Includes Arizona; Arkansas; California; Colorado; Idaho; Iowa; Kansas; Montana; Nebraska; Nevada; New Mexico; North Dakota; Oklahoma; Oregon; South Dakota; Texas; Utah; Washington; Wyoming.
axis order change (2D) + NAD27 to WGS 84 (5) + axis order change (2D)	11 m	United States (USA) - CONUS east of Mississippi River - onshore - including entire states of Louisiana; Missouri; Minnesota as well as Alabama; Connecticut; Delaware; Florida; Georgia; Illinois; Indiana; Kentucky; Maine; Maryland; Massachusetts; Michigan; Mississippi; New Hampshire; New Jersey; New York; North Carolina; Ohio; Pennsylvania; Rhode Island; South Carolina; Tennessee; Vermont; Virginia; West Virginia; Wisconsin.
axis order change (2D) + NAD27 to WGS 84 (18) + axis order change (2D)	12 m	Mexico - onshore.
axis order change (2D) + NAD27 to WGS 84 (11) + axis order change (2D)	12 m	Canada - Manitoba; Ontario.
axis order change (2D) + NAD27 to WGS 84 (12) + axis order change (2D)	9 m	Canada - onshore - New Brunswick; Newfoundland and Labrador; Nova Scotia; Prince Edward Island; Quebec.

Transformations change the datum, so each has an accuracy and an area of use. Choose the most accurate one that covers your data and record its name. See datum transformations.

Grid-based operations not bundled with standard PROJ installs: NAD27 to WGS 84 (33); NAD27 to WGS 84 (79); NAD27 to WGS 84 (85); NAD27 to WGS 84 (78).

Definitions and downloads

PROJ string

+proj=longlat +datum=NAD27 +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=longlat +ellps=clrk66 +towgs84=-10,158,187 +no_defs

Datum shift from NAD27 to WGS 84 (3) (EPSG accuracy 20 m), the best single Helmert operation for this area of use. Where PROJ prefers a grid-based or multi-step operation (see the table above), results can differ by up to that operation's accuracy.

WKT2:2019

GEOGCRS["NAD27", DATUM["North American Datum 1927", ELLIPSOID["Clarke 1866",6378206.4,294.978698213898, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], USAGE[ SCOPE["Geodesy."], AREA["North and central America: Antigua and Barbuda - onshore. Bahamas - onshore plus offshore over internal continental shelf only. Belize - onshore. British Virgin Islands - onshore. Canada onshore - Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan and Yukon - plus offshore east coast. Cuba - onshore and offshore. El Salvador - onshore. Guatemala - onshore. Honduras - onshore. Panama - onshore. Puerto Rico - onshore. Mexico - onshore plus offshore east coast. Nicaragua - onshore. United States (USA) onshore and offshore - Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming - plus offshore . US Virgin Islands - onshore."], BBOX[7.15,167.65,83.17,-47.74]], ID["EPSG",4267]]

Downloads

4267.prj — ESRI WKT for shapefiles
4267.wkt — OGC WKT2:2019

FAQ

What is EPSG:4267?

Where can EPSG:4267 be used?

Its area of use is: North and central America: Antigua and Barbuda - onshore. Bahamas - onshore plus offshore over internal continental shelf only. Belize - onshore. British Virgin Islands - onshore. Canada onshore - Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan and Yukon - plus offshore east coast. Cuba - onshore and offshore. El Salvador - onshore. Guatemala - onshore. Honduras - onshore. Panama - onshore. Puerto Rico - onshore. Mexico - onshore plus offshore east coast. Nicaragua - onshore. United States (USA) onshore and offshore - Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming - plus offshore . US Virgin Islands - onshore.

What is the axis order of EPSG:4267?

By the EPSG definition: Geodetic latitude, Geodetic longitude. Many GIS formats such as GeoJSON and KML store longitude first instead.

How accurate is the transformation from EPSG:4267 to WGS 84?

The most accurate EPSG transformation listed here is “axis order change (2D) + NAD27 to WGS 84 (6) + axis order change (2D)”, with a stated accuracy of 7 m for United States (USA) - CONUS west of Mississippi River - onshore - excludes those states covered under Area 2389 - Includes Arizona; Arkansas; California; Colorado; Idaho; Iowa; Kansas; Montana; Nebraska; Nevada; New Mexico; North Dakota; Oklahoma; Oregon; South Dakota; Texas; Utah; Washington; Wyoming.. Always check the area of use before applying it.

Coordinate systems

Articles

Tools

References

IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_4267.
PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:4267 — NAD27.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/4267/