Abstract
The article describes a detailed analysis of the modernisation procedure for cadastral data in Poland in both theoretical and practical aspects. Modernisation of the cadastral system is an essential tool to ensure both the continuity in time and the timeliness of cadastral data. In Poland, the function of the Cadastre is served by a public register known as the Land and Building Cadastre which records the actual data on the ground, resulting from the current state of ownership or use. Legal data are stored in a separate register known as the Land and Mortgage Register. The Cadastre in Poland has numerous disadvantages; however, its advantage is that no construction of the system anew is required. The existing cadastral data need to be skilfully used, and the quality of cadastral data needs to be adjusted to international requirements through the use of technical and legal guidelines in the field of modernisation. The research material consisted of source texts of existing legal provisions equivalent to an act of legislature and implementing regulations as well as technical documentation for modernisation works performed in southern Poland (Małopolskie Voivodeship). The method of comparative analysis of the compliance of modernisation work results with national requirements was applied. An analysis of the adopted indicators for cadastral data evaluation, using the selected example, showed that the properly performed modernisation of the Land and Building Cadastre may become a tool for improving the land management and administration process.