BunnyRabbit wrote:Some thoughts on the NT co-ordinates now I've had a bit of time to look at them.
So far we have four points
Two sets [i]almost /i] form right angled triangles. But not quite. 86 and 88 degrees, or there about. You need right angles to get a regular hexagon
Together they seem to start forming an irregular hexagon, but so do any four points.
Individually they don't point to anything in the NT area that isn't on private property and collectively they don't centre on anything either.
Any four six-digit numbers will give you points on an OS map. They might not all fall onto land and they might not all fall into pattern vaguely suggestive of a hexagon though.
At best I think the co-ordinates will form a complete hexagon that is almost regular but (if that does happen) that it will be either an unintended co-incidence or only a partially intended one.
Regardless if it is in the right geographical area, I thought it is at least an interesting way to use it as visual model to predict the two remaining numbers. It seems to me that the first model posted was done by hand plotting hence the decimals. I did it in two different ways, one using the exact corresponding height and width to other grid references. And one that compensate for the slight skewness.
With using exact height and width corresponding to the existing pointers: NT 284557 & NT 519742
With added compensation: NT 300554 & NT 501739