General Land Office Plats. General Land Office (GLO) plat maps are derived from original surveyor notes of the State of Michigan. The survey was conducted in the early to mid 1800's. All documents pertaining to the original survey of Michigan can be found in the State Archives of Michigan. To view a map, select a county from the State map or list. Mapbox. "At Replica, we know our customers need data that helps connect the dots between often siloed domains — like land use, population growth, mobility, and economic development. Regrid's parcel data is a core component of our integrated land use layer, which helps our customers understand the causes and downstream impacts of the mobility.