tiompan wrote:
Sdaly GE is in poor resolution for the area and I think it worth mentioning that GPS should only be treated as a guide ,the closer the stones are to another the less likely that the orientation will be accurate .
Unless you have one of those mega expensive 3mm GPS things the archaeo companies use (which I don't, by the way).The only answer would be proper surveying with a theodolite (and I don't have one of those either).
They must have been surveyed properly for the Tipp Inventory.