CASA is an international research centre developing state of the art computer technologies for applications relating to urban spatial systems. These currently embrace methods for spatial representation such as geographic information systems (GIS), computer aided design (CAD), and visualization using multimedia as well as methods for simulating urban form and structure which build on a spectrum of geospatial techniques from standard GIS through to spatial modelling, visualisation and crowd sourcing. CASA forms one of two specialist research centre’s in The Bartlett, UCL’s Faculty of the Built Environment.