EPSG systems

EPSG:22641 NAD83(CSRS)v6 / MTM zone 1

Projected system (Transverse Mercator) in use: Canada - Newfoundland - east of 54.5°W. 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:22641
NameNAD83(CSRS)v6 / MTM zone 1
TypeProjected system — Transverse Mercator
Area of use Canada - Newfoundland - east of 54.5°W
Canada - Newfoundland - onshore east of 54°30'W.
Bounds W -54,50° · S 46,56° · E -52,54° · N 49,89°
Countries Canada
DatumNorth American Datum of 1983 (CSRS) version 6
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:8252 — NAD83(CSRS)v6
Unit metre (E(X) east, N(Y) 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-53degree
Scale factor at natural origin0.9999unity
False easting304800metre
False northing0metre

proj4 definition

+proj=tmerc +lat_0=0 +lon_0=-53 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +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:22641.

WKT (ESRI format, the .prj content)

PROJCS["NAD83(CSRS)v6_MTM_Zone_1",GEOGCS["GCS_NAD83_CSRS_v6",DATUM["North_American_Datum_of_1983_(CSRS)_version_6",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",304800.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-53.0],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.