Coordinate Reference Systems
Transform Coordinates
Remarks
Parameter values from TM75 to ETRS89 (2) (code 1953). Assumes each pair of (i) OSNI 1952 and TM75, and (ii) ETRS89 and WGS 84, can be considered the same to within the accuracy of the transformation.
Frequently Asked Questions
How do I convert OSNI 1952 to WGS 84 coordinates?
Use the coordinate transformation tool above to convert OSNI 1952 (EPSG:4188) to WGS 84 (EPSG:4326). Enter your source coordinates and click Transform. This uses the Position Vector transformation (geog2D domain) method with 1m accuracy.
How do I transform OSNI 1952 to WGS 84 using Proj4js?
Use proj4.defs to define both EPSG:4188 and EPSG:4326, then call proj4(source, target, [x, y]) to convert coordinates programmatically.
What is the accuracy of the OSNI 1952 to WGS 84 transformation?
This transformation (EPSG:1955) has an accuracy of 1m using the Position Vector transformation (geog2D domain) method. Area of use: UK - Northern Ireland - onshore.