You can access the contact map by clicking on the second icon on the Contacts tab's sidebar:
The contact map show a full screen map with all of the addresses registered marked with either an orange icon (companies) or a blue icon (factories):
The map is powered by Google Maps and has all of its usual behaviors, such as zooming with the mousewheel or drag/drop to move around the map.
Click on a marker to show more details about the contact and open its contact page:
Note: just all other 'list' views on Winddle, the contacts shown are the same that are currently filtered and on the current page. To display more relevant contacts, you can try to increase the number of contacts shown per page (in the sidebar menu, once expanded), or by filtering on a country for instance.