Geodetic Reference System of Northern Ireland 

Collection by Stefan A. Voser		 MapRef 
MapRef

22. Sept. 1998 update  
Country  Name  Central Point  Spheroid  Parameters  Description  Source 
dx [m]  dy [m]  dz [m]  rx ["]  ry ["]  rz ["]  ds [ppm] 
National 
Northern Ireland  Northern Ireland 1952   Airy 
Regional 
Ireland Ireland 1975 Slieve Donard Airy Modified 
MapRef
© by Stefan A. Voser, 1998 
 
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