The article presents the method of switching from 2D cadastre to 3D + time systems using available IT tools, based on the existing official geospatial data registers. For more than twenty years in Poland, the official registers of information about land structures have been modernised. This modernisation includes the securing and protecting the rights to real properties, increasing the effectiveness of databases, increasing the data quality, as well as improving the effectiveness of land planning and management. Advanced CAD technologies enable the development of Digital Terrain Model (DTM) and, at a further stage, visualisation of surface objects, such as borders of land parcels or outlines of buildings, in 3D space. Modern relational databases and CAD tools also enable the reconstruction of the state of real property of any point of time.
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