Our contribution concerns the use of Social Media Geographic Information (SMGI) as an emergent pluralist source of information which may find valuable application in spatial planning and Geodesign. On the base of empirical research, the authors propose a tentative framework for SMGI Analytics in spatial planning. Among other methods, Spatial-Temporal Textual Analysis (STTx) is proposed as a tool to investigate people perceptions and interest in space and time. Possible implications and benefits of SMGI analytics for the planning practice emerge from the overall discussion.