EPSG systems

EPSG:2290 ATS77 / Prince Edward Isl. Stereographic (ATS77)

Projected system (Oblique Stereographic) in use: Canada - Prince Edward Island. 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:2290
NameATS77 / Prince Edward Isl. Stereographic (ATS77)
TypeProjected system — Oblique Stereographic
Area of use Canada - Prince Edward Island
Bounds W -64,49° · S 45,90° · E -61,90° · N 47,09°
Countries Canada
DatumAverage Terrestrial System 1977
Ellipsoid Average Terrestrial System 1977 a = 6378135 m · 1/f = 298.257
Base geographic system EPSG:4122 — ATS77
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 origin47.25degree
Longitude of natural origin-63degree
Scale factor at natural origin0.999912unity
False easting700000metre
False northing400000metre

proj4 definition

+proj=sterea +lat_0=47.25 +lon_0=-63 +k=0.999912 +x_0=700000 +y_0=400000 +a=6378135 +rf=298.257 +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:2290.

WKT (ESRI format, the .prj content)

PROJCS["Prince_Edward_Island_Stereographic",GEOGCS["GCS_ATS_1977",DATUM["D_ATS_1977",SPHEROID["ATS_1977",6378135.0,298.257]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Double_Stereographic"],PARAMETER["False_Easting",700000.0],PARAMETER["False_Northing",400000.0],PARAMETER["Central_Meridian",-63.0],PARAMETER["Scale_Factor",0.999912],PARAMETER["Latitude_Of_Origin",47.25],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.