Tree leaning so far it's almost horizontal

[phma]

I am in fact doing a survey, but none of those trees is a lot corner. The front corners are metal pipes, and I know their positions within 20 mm or so. I surveyed a lot two years ago where several corners are described as trees, two of which (a pine and an oak) were still standing at the time of the survey. (I have pictures but haven’t uploaded them yet.) I recently surveyed a lot where one of the corners is an iron (missing but I set it) next to a “poplar”; that tree is now a research grade tuliptree. If a tree is a lot corner, and it’s leaning or fallen over, then I have to measure the position of its base.