Brilliant thanks. It is actually for the National Transport Authority in Ireland, but surveying over here isn't as regulated/structured as in the US, ...

Thanks for the detailed breakdown. That's a huge help.

Working in ITM coord system. It's based on the TM projection. Same ellipsoid as UTM. Thanks for all the replies and advice. Much clearer in my head no...

Thanks OleManRiver.<div>I think I'm in the lucky position that the scale factor of my projection is very close to 1 at my survey location. (Irel...

Thanks for all the great advice so far. If I leave my GPS points in Grid do I need to apply a scale factor in my Trimble Access job when I start trave...

Thanks for the replies so far. From further reading on the forum think the idea of converting grid to ground coordinates is not a viable option. Am I ...