Transformations and OSGM02 user guide - Leica Geosystems

The offset values are given by:dx = x – x 0= 307.0032dy = y – y 0= 255.6860t = dx/1 000= 0.3070032u = dy/1 000= 0.2556860The shifts are therefore:se = (1 – t)(1 – u) se 0+ ( t)(1 – u) se 1+ ( t)( u) se 2+ ( 1 – t)( u) se 3= 102.789sn = (1 – t)(1 – u) sn 0+ ( t)(1 – u) sn 1+ ( t)( u) sn 2+ (1 – t)( u) sn 3= -78.238sg = (1 – t)(1 – u) sg 0+ ( t)(1 – u) sg 1+ ( t)( u) sg 2+ (1 – t)( u) sg 3= 44.244And finally, the National Grid (OSGB36) eastings and northings coordinates are given by:en= x + se= 651 409.792= y + sn= 313 177.448The orthometric height h is given byh= 108.05 - sg= 108.05 – 44.244= 63.806Transformations and OSGM02 user guide appendix Av2.1 9/2002 © crown copyrightPage 31