I did this by simply placing my table mat on top of the map and cutting round with a rotary cutter. (pillarboxblue.com)
These might be video clips that are connected to information about different parts of the digestive system, or maybe links to deeper information about Brazil placed on top of a map of the country. (edutopia.org)
Also Developers can now overlay georeferenced images on top of the map so that they move and scale as users pan and zoom the map. (gizcentral.com)