Large buildings are hard to manage. Tango Vision helps building managers communicate with their tenants and visitors, creating a building's ecosystem,around it's digital twin. Tango Vision platform lets building operators start building their visitor centered digital twin. Visitor experience will be improved, profits will grow due to savings from automation and conditional digital signage. Map layers can be embedded into websites and mobile apps, as well as displayed on a interactive kiosk. Different user roles can access different map layers relevant to their activities. Each layer can have individual connections to outside data sources. The data collected from all layers begins to form the memory of the digital twin of the building. Predictive analytics and AI are the final steps bringing the effectiveness of the building operations to the maximum possible levels.