United States (USA) - Michigan - counties of Allegan; Barry; Bay; Berrien; Branch; Calhoun; Cass; Clinton; Eaton; Genesee; Gratiot; Hillsdale; Huron; Ingham; Ionia; Isabella; Jackson; Kalamazoo; Kent; Lapeer; Lenawee; Livingston; Macomb; Mecosta; Midland; Monroe; Montcalm; Muskegon; Newaygo; Oakland; Oceana; Ottawa; Saginaw; Sanilac; Shiawassee; St Clair; St Joseph; Tuscola; Van Buren; Washtenaw; Wayne.

@misc{26990_area_of_use
author=geoepsg_dataset Contributors",
title="United States (USA) - Michigan - counties of Allegan; Barry; Bay; Berrien; Branch; Calhoun; Cass; Clinton; Eaton; Genesee; Gratiot; Hillsdale; Huron; Ingham; Ionia; Isabella; Jackson; Kalamazoo; Kent; Lapeer; Lenawee; Livingston; Macomb; Mecosta; Midland; Monroe; Montcalm; Muskegon; Newaygo; Oakland; Oceana; Ottawa; Saginaw; Sanilac; Shiawassee; St Clair; St Joseph; Tuscola; Van Buren; Washtenaw; Wayne.",
"url="http://www.opengis.net/def/crs/EPSG/0/26990_area_of_use",
note="[Online; documentation generated at 2025-10-19]"}