The Ministry of Domains, Cadastre and Land Affairs (MINDCAF) is the Cameroonian government ministry responsible for drawing up and implementing government policy on domains, cadastre and land. However, the land management policy in Cameroon, and more specifically in the ocean, which envisages emergence in 2035, suffers from numerous problems, such as the complexity of organising the storage and updating of data and access to reliable land information. The aim of the study is to set up a GIS to manage the land assets of the ocean, more specifically TALLA. The methodology consisted of using the cadastral map to choose the GIS technologies and define the architecture of our operation by reorganising the elements of our cadastral map and processing them in ArcGIS and QGIS software, all the while entering the information from the land register in the Attributor table, creating a database. Finally, the GIS has been developed in compliance with technical standards and established objectives. As a result, our GIS offers functionalities enabling the member of the land registry to better archive data, and facilitates the output of the property certificate. It also enables geographic data to be viewed and consulted on an interactive map, spatial and attribute navigation, and data editing. In the light of its results, the GIS implemented can be a promising solution for meeting the challenges associated with current management.