Co-ordinate Converter

Updated Web Coordinate Converter – Now Available

Interactively convert co-ordinate points or files of co-ordinate points between the following co-ordinate reference systems:

  • WGS84 (World Geodetic System 1984) / ETRF89 (European Terrestrial Reference Frame 1989)
  • Irish Grid
  • ITM (Irish Transverse Mercator)
  • UTM (Universal Transverse Mercator)

OSGM15 and OSTN15 – Updated Transformations for UK and Ireland

The Ordnance Survey of Great Britain (OSGB), Ireland (OSi) and Land & Property Services (LPS – Formerly OSNI) have collaborated again to improve the OSGM02 geoid model covering the United Kingdom and Ireland. A new Geoid model OSGM15 will be launched on the 26th of August 2016.

Further information is provided in the article which can be found here.

The polynomial transformation for Ireland and Northern Ireland has not changed however there is a new version of Grid Inquest; Grid Inquest II available for download from the below links. Grid Inquest II will take over from Grid Inquest I on the 26th of August 2016. Before this date Grid Inquest II should not be used and after this date Grid Inquest 1 shouldn’t be used. Grid Inquest 2 links below.


There is also a developers pack available to download here.