It was only ten years ago that free and public access to satellite images and maps of the world using web-based mapping products became available. Not long ago, official cartography was the only option. Google Maps and Google Earth have allowed for the visualization and navigation of cities easily from personal computers and cellphones. Not only can we consult maps from our cellphones, but we are also able to make collective maps through crowdsourcing online software. Today, aerial pictures can be taken with small and easy-to-use drones. This technological revolution has challenged the field of cartography, allowing citizens to visualize and create maps of places that have remained unmapped. Such is the case of most informal settlements developed spontaneously without an urban plan.
