GARMIN 010-C0906-00 MapSource Topo 2008 Western Great Lakes MicroSD Card. Now you can get all the detail of Garmin MapSource United States Topo 2008 without messy unlock codes and time-consuming downloads. Garmin has created Pre-Programmed MicroSD cards that contain the same MapSource Topo data you know and love broken down by region. Saves you time and money. Plan your next outdoor adventure with the help of MapSource United States Topo. This card contains detailed topographical coverage of the U.S. shores of the Great Lakes from Cleveland OH to Duluth MN. Also includes coverage throughout Minnesota Wisconsin Michigan Iowa Indiana and Ohio as well as Illinois north of East Saint Louis and Kentucky north of Interstate 64.