The modern Spatial Data Infrastructure of the Municipality of Herakleion has already received many positive comments by its users, the number of whom is over 1.000 per month. Based on the statistical analysis of users’ responses, a large percentage of users uses the web Portal very often for professional reasons, 90% of them are engineers, and they declare that they are very satisfied with Portal’s functionality. For this new project, capacities regarding management and enrichment of urban planning information provided by the system, will be further developed, integrating also information for building permissions, altitude certificates, dangerous constructions, preservation and monuments.