EPSG systems

EPSG:9766 EWR2 Grid

Projected system (Transverse Mercator) in use: UK - Oxford to Bedford. 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:9766
NameEWR2 Grid
TypeProjected system — Transverse Mercator
Area of use UK - Oxford to Bedford
United Kingdom (UK) - on or related to East West Rail (Phase 2) routes from Oxford to Bicester, Bletchley and Bedford, and from Claydon Junction to Aylesbury and Princes Risborough.
Bounds W -1,43° · S 51,70° · E -0,36° · N 52,24°
Countries United Kingdom
DatumEWR2 Intermediate Reference Frame
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:9763 — EWR2-IRF
Unit metre (E east, N north)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeEngineering survey and topographic mapping for railway applications.

Projection parameters

ParameterValueUnit
Latitude of natural origin51.95degree
Longitude of natural origin-0.9degree
Scale factor at natural origin1unity
False easting192519.9715metre
False northing146942.6806metre

proj4 definition

+proj=tmerc +lat_0=51.95 +lon_0=-0.9 +k=1 +x_0=192519.9715 +y_0=146942.6806 +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:9766.

WKT (ESRI format, the .prj content)

PROJCS["EWR2_Grid",GEOGCS["GCS_EWR2-IRF",DATUM["EWR2_Intermediate_Reference_Frame",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",192519.9715],PARAMETER["False_Northing",146942.6806],PARAMETER["Central_Meridian",-0.9],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",51.95],UNIT["Meter",1.0]]

All systems — United Kingdom

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