Google maps indoor comes to France
Google just announced on their google maps blog that lucky Android users in France (as opposed to sad apple maps users) now have access to indoor maps in a bunch of popular venues :
Whether you use indoor maps to view the different departments of iconic French retailers like Galeries Lafayette Montparnasse, or simply to find your way to a fresh loaf of bread at the local Carrefour supermarket, Google Maps for Android can help you explore the great indoors. For a list of locations for which indoor maps are available, check out our Help Center article here.
Setting up your venue for indoor location is actually surprisingly issue, first, create and upload a floor plan, then use the Google maps floor marker app to improve location (by collecting publicly broadcast data on sample points on the floor plan)