![1858 Marengo Township, Michigan landownership map](images/maps/CalhounMarengo1858.png)
![1894 Marengo Township, Michigan landownership map](images/maps/CalhounMarengo1894.png)
![2009 Marengo Township, Michigan map](images/maps/CalhounMarengo2009.png)
Choose a land-ownership map to view, and then use the opacity slider to overlay the historic map onto a 2010 census street map. Slowly change the opacity until you can see both maps clearly or view each map separately by moving the slider to the top or bottom.