Point Cloud Ground Control Points heights Accuracy

Hello 

 

Thank you very much for the help. 

I have just tried that but sadly it is still doing the same. I don’t quite understand why it would do this either to show the z error of -100,000,

When I create the GCP it shows correctly and then as soon as I add images then it starts to show wrong data so I assume I am bringing in the file correctly because it shows the correct location in the map.

I think I must be so  close it is just this one last thing stopping me getting my results. I assume it must be possible ?

Thank you 

 

Rob Grain