EPSG:10183 DoPw22 Grid
Projected system (Transverse Mercator) in use: UK - Dovey Junction to Pwllheli. 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:10183 |
|---|---|
| Name | DoPw22 Grid |
| Type | Projected system — Transverse Mercator |
| Area of use |
UK - Dovey Junction to Pwllheli United Kingdom (UK) - on or related to the rail route from Dovey Junction to Pwllheli. |
| Bounds | W -4,51° · S 52,45° · E -3,80° · N 53,01° |
| Countries | United Kingdom |
| Datum | DoPw22 Intermediate Reference Frame |
| Ellipsoid | GRS 1980 a = 6378137 m · 1/f = 298.257222101 |
| Base geographic system | EPSG:10175 — DoPw22-IRF |
| Unit | metre (E east, N north) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Engineering survey and topographic mapping for railway applications. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of natural origin | 52.7 | degree |
| Longitude of natural origin | -4.15 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 64859.6557 | metre |
| False northing | 122266.5277 | metre |
proj4 definition
+proj=tmerc +lat_0=52.7 +lon_0=-4.15 +k=1 +x_0=64859.6557 +y_0=122266.5277 +ellps=GRS80 +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:10183.
WKT (ESRI format, the .prj content)
PROJCS["DoPw22_Grid",GEOGCS["GCS_DoPw22-IRF",DATUM["DoPw22_Intermediate_Reference_Frame",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",64859.6557],PARAMETER["False_Northing",122266.5277],PARAMETER["Central_Meridian",-4.15],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",52.7],UNIT["Meter",1.0]]Other systems — United Kingdom
- EPSG:10175DoPw22-IRF
- EPSG:10185ShAb07-IRF
- EPSG:10188ShAb07 Grid
- EPSG:10191CNH22-IRF
- EPSG:10194CNH22 Grid
- EPSG:10196CWS13-IRF
- EPSG:10199CWS13 Grid
- EPSG:10204DIBA15-IRF
- EPSG:10207DIBA15 Grid
- EPSG:10209GWPBS22-IRF
- EPSG:10212GWPBS22 Grid
- EPSG:10214GWWAB22-IRF
- EPSG:10217GWWAB22 Grid
- EPSG:10219GWWWA22-IRF
- EPSG:10222GWWWA22 Grid
- EPSG:10224MALS09-IRF
- EPSG:10227MALS09 Grid
- EPSG:10229OxWo08-IRF
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.