This short paper presents a description of SDF-FuzzIA, a Fuzzy-Ontology LLM-based system for the intelligent analysis of geo-thematic data that serves as a plug-in to the Sustainability Decision Framework (SDF) Decision Support System (DSS). A description of the components implemented in the system is given, followed by an explanation of the interaction between the components and the main system. As this still is a work in progress, future directions and possible hurdles are explored.