The “Firefighting Water Supply System” (DECI) refers to all devices—water points, hydrants, pipelines, reservoirs—designed to supply fire and rescue services. By coupling these infrastructures with geomatic systems, users can access precise mapping of all assets, monitor their operational status in real time, run simulations of accessibility and pressure, and optimize intervention coverage areas. This approach ensures maximum efficiency of firefighting resources, identifies vulnerabilities, and enables precise deployment planning. The result: reduced response times and improved protection of lives and property.