The main focus of this research is to contribute in some way to the adoption of digital engineering by public authorities, with the aim of improving the basic principles of public administration: transparency, speed and efficiency. Through a bibliographic review, the paper explores the Geographic Information System and the Building Information Modeling system, applied as a mechanism for realizing the concept of the smart city, that is, through the management of information in the built space. As a technology capable of parameterizing objects, the integration of these two systems makes it possible to improve urban planning, the efficiency of public services, transparency and sustainability aimed at city development. The GIS/BIM system will contribute to both the city manager and the ordinary citizen. It is important to demonstrate the essential need to integrate internal modeling with external modeling, so that a more realistic view of the urban space is possible. And finally, to show that real, accessible, integrated information is a means of optimizing public services in order to achieve smart city status.