EPSG:2021 NAD27(76) / MTM zone 12
Projected system (Transverse Mercator) in use: Canada - Ontario - MTM zone 12. 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.
| Code | EPSG:2021 |
|---|---|
| Name | NAD27(76) / MTM zone 12 |
| Type | Projected system — Transverse Mercator |
| Area of use |
Canada - Ontario - MTM zone 12 Canada - Ontario - between 82°30'W and 79°30'W: north of 46°N in area between 82°30'W and 80°15'W, north of 47°N in area between 80°15'W and 79°30'W. |
| Bounds | W -82,50° · S 46,00° · E -79,50° · N 55,21° |
| Countries | Canada |
| Datum | North 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) |
| Scope | Engineering survey, topographic mapping. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 0 | degree |
| Longitude of natural origin | -81 | degree |
| Scale factor at natural origin | 0.9999 | unity |
| False easting | 304800 | metre |
| False northing | 0 | metre |
proj4 definition
+proj=tmerc +lat_0=0 +lon_0=-81 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +units=m +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:2021.
WKT (ESRI format, the .prj content)
PROJCS["NAD_1927_DEF_1976_MTM_12",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",-81.0],PARAMETER["Scale_Factor",0.9999],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]Other systems — Canada
- EPSG:2012NAD27(CGQ77) / SCoPQ zone 6
- EPSG:2013NAD27(CGQ77) / SCoPQ zone 7
- EPSG:2014NAD27(CGQ77) / SCoPQ zone 8
- EPSG:2015NAD27(CGQ77) / SCoPQ zone 9
- EPSG:2016NAD27(CGQ77) / SCoPQ zone 10
- EPSG:2017NAD27(76) / MTM zone 8
- EPSG:2018NAD27(76) / MTM zone 9
- EPSG:2019NAD27(76) / MTM zone 10
- EPSG:2020NAD27(76) / MTM zone 11
- EPSG:2022NAD27(76) / MTM zone 13
- EPSG:2023NAD27(76) / MTM zone 14
- EPSG:2024NAD27(76) / MTM zone 15
- EPSG:2025NAD27(76) / MTM zone 16
- EPSG:2026NAD27(76) / MTM zone 17
- EPSG:2027NAD27(76) / UTM zone 15N
- EPSG:2028NAD27(76) / UTM zone 16N
- EPSG:2029NAD27(76) / UTM zone 17N
- EPSG:2030NAD27(76) / UTM zone 18N
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.