EPSG systems

EPSG:2020 NAD27(76) / MTM zone 11

Projected system (Transverse Mercator) in use: Canada - Ontario - MTM zone 11. The full definition below, and conversion in one click.

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

System record
CodeEPSG:2020
NameNAD27(76) / MTM zone 11
TypeProjected system — Transverse Mercator
Area of use Canada - Ontario - MTM zone 11
Canada - Ontario - south of 46°N and west of 81°W.
Bounds W -83,60° · S 41,67° · E -81,00° · N 46,00°
Countries Canada
DatumNorth American Datum 1927 (1976)
Ellipsoid Clarke 1866 a = 6378206.4 m · 1/f = 294.978698214
Base geographic system EPSG:4608 — NAD27(76)
Unit metre (E east, N north)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeEngineering survey, topographic mapping.

Projection parameters

ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin-82.5degree
Scale factor at natural origin0.9999unity
False easting304800metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=0 +lon_0=-82.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +units=m +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:2020.

WKT (ESRI format, the .prj content)

PROJCS["NAD_1927_DEF_1976_MTM_11",GEOGCS["GCS_NAD_1927_Definition_1976",DATUM["D_NAD_1927_Definition_1976",SPHEROID["Clarke_1866",6378206.4,294.978698213898]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",304800.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-82.5],PARAMETER["Scale_Factor",0.9999],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — Canada

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.