I'm not OP but I recognized this as the three houses by the lake west of West Point so I thought I'd chime in with a link. This error is visible on the PZ map as well (set level to 1 or more to view it)
https://map.projectzomboid.com/#0.6619350517168122,0.21171136975131744,410.1862702460018
EDIT: Cell 33x22, Coords 10110x6635 through 10110x6638