The study on the process of the Implementation of a Geographic Information System in the Management of Cadastral Data in case of a volcanic eruption was conducted in the district of Volcano, a part of the city of Goma, the most affected by the problem of urbanization and exposed to volcanic risks. The goal of this work is to establish a Geographic Information System to manage the parcels of the city of Goma with precision despite the passage of a volcanic eruption, the progress made in the field of information management system, the development of reliable and fast techniques of data collection and processing, the evolution of the hardware, the rapid decrease of its cost and that of the software allow to consider that the technical problems are largely overcome today Many cities have put in place a land use planning system and a system for the management of cadastral data; in our country, more specifically in the city of Goma, comprehensive studies on the geographic information system remain relatively weak. This work focuses on the general application of GIS in the management of cadastral data. Firstly, a presentation of geographic information system was evoked in this work, then a freezing of a cadastral block, of the city of Goma, subdivision will be set up. Secondly, a study of the importance of the implementation of a management system of the cadastral data through the GIS system will be analyzed.