What exactly constitutes a smart city?
A smart city can be many things to many different people, but one thing they all share is their use of cloud technology and IoT systems to link parts of municipal infrastructure.
These sites are the control rooms of the modern smart city.
In this week's Top 10, Energy Digital looks at some of the data hubs behind ground-breaking urban energy initiatives.
Aspern Smart City Research Location: Austria Constructed: 2013 Tech provider: Siemens Notable feature: Live energy data from buildings, the grid and 111 volunteer households Imagine every building in a country reproduced in 3D, then wired to live data.