EPSG:10275 SMITB20 Grid
Projected system (Transverse Mercator) in use: UK - Okehampton to Penstone. 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:10275 |
|---|---|
| Name | SMITB20 Grid |
| Type | Projected system — Transverse Mercator |
| Area of use |
UK - Okehampton to Penstone United Kingdom (UK) - on or related to the rail route from Okehampton to Penstone. |
| Bounds | W -4,11° · S 50,65° · E -3,60° · N 50,86° |
| Countries | United Kingdom |
| Datum | SMITB20 Intermediate Reference Frame |
| Ellipsoid | GRS 1980 a = 6378137 m · 1/f = 298.257222101 |
| Base geographic system | EPSG:10272 — SMITB20-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 | 50.75 | degree |
| Longitude of natural origin | -3.85 | degree |
| Scale factor at natural origin | 1 | unity |
| False easting | 110693.666 | metre |
| False northing | 102089.2943 | metre |
proj4 definition
+proj=tmerc +lat_0=50.75 +lon_0=-3.85 +k=1 +x_0=110693.666 +y_0=102089.2943 +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:10275.
WKT (ESRI format, the .prj content)
PROJCS["SMITB20_Grid",GEOGCS["GCS_SMITB20-IRF",DATUM["SMITB20_Intermediate_Reference_Frame",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",110693.666],PARAMETER["False_Northing",102089.2943],PARAMETER["Central_Meridian",-3.85],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",50.75],UNIT["Meter",1.0]]Other systems — United Kingdom
- 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
- EPSG:10235OxWo08 Grid
- EPSG:10237SYC20-IRF
- EPSG:10240SYC20 Grid
- EPSG:10272SMITB20-IRF
- EPSG:10277RBEPP12-IRF
- EPSG:10280RBEPP12 Grid
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.