## 1 Introduction
Data of industries subject to licenses are of considerable interest to stakeholders (Environmental Protection Agencies, police forces, regions, provinces, municipalities, Local Health Authorities, operators, research bodies, citizens), to monitor industrial pollutant emission trends and to evaluate the effect of industrial activities on the environment and human health. Unfortunately, these data are often not properly digitized and processed, as they are unavailable. Therefore, they are not sufficient to assess the effectiveness of the actions aimed to protect the environment. Flexible data management and information systems are necessary to provide meaningful information to stakeholders. These systems should support not only the storage of data, but also their description with comprehensive and standardized metadata [14]. Modern information technology and, in particular, the integration of monitoring and data base management systems, Geographical Information System (GIS), simulation modelling, and expert systems offers many possibilities to support data and information management tasks with a new level of efficiency and effectiveness [15; 16; 17]. At the same time, easy and direct access to information on the environment held by public authorities can be realized efficiently by multimedia technologies, using the Internet as the medium of visibility and consultation [15]. In this context, our project aims to design and develop a database integrated with a web-based GIS platform to collect, manage and share data on industrial wastewater, urban sewage, atmospheric emissions and waste management of installations subject to authorizations. In particular, this study presents a complete and continuously updated database and a web interface as a solution for the application, administration and consultation of environmental authorizations. Indeed, our work provides a practical, flexible and interactive working tool for police forces, competent authorities, operators and research bodies, to make licensing process and preliminary investigation more efficient. Moreover, this tool makes it easier to share the emissions data with the stakeholders. The data are supplied by all stakeholders involved strictly related to their role: data on inspection are provided by police forces, emissions data by competent authorities and operators and so on. These inventories can be used for both health and environmental research purposes, as well as for improving urban and territorial planning. For example, they generate unique opportunities to strategically address the challenges associated with the sustainable development of the United Nations Goals (SDGs) to ensure a fair, environmentally sustainable and healthy society [18]. The project also aims to involve citizens on environmental issues and thus simplify the citizens' access to these data, according to current legislation (e.g., Directive 2003/04/CE, Italian Legislative Degree 195/2005 and Italian Legislative Degree 33/2013). In the last years, many web platforms were developed to support different environmental goals (e.g., water management, soil management, ecosystem and forest management), as reported extensively in the literature [19; 20; 21; 22]. These platforms are helpful in managing specific environmental issues, but on the other hand they cannot be used all at once for different environmental sectors and by a large number of stakeholders. As the best of our knowledge this is the first systematic study that proposed, for a Public Administration, an integrated web-based GIS platform to simultaneously support the management of administrative procedures, environmental inspection and scientific research. The interconnection between these activities is important for the environmental protection, but at the same time it is generally complicated.