Legal and technical aspects of harmonization of databases of buildings

The article analyses the legal regulations which govern the principles of maintaining the real estate cadastre in Poland and the database of topographic objects, tax records as well as the system of land and mortgage registers, with reference to buildings as objects of these databases. Particular attention was paid to descriptive attributes of buildings, such as building identifier, building status, building type, class, and function, regarding the possibility to capture these attributes, and concerning reference data sources. It was assessed which of them result directly from the European Union provisions and which from the Polish legal regulations. Another aspect of the analysis was to identify these attributes that should supply the remaining databases in question, for which the real estate cadastre is the reference database. By comparing attributes of the building collected in each of these databases, it was defined which of them are necessary and which are not used uniformly in the databases and could be deleted from the cadastral database without compromising its quality. PRAWNE I TECHNICZNE ASPEKTY HARMONIZACJI BAZ DANYCH W ZAKRESIE BUDYNKÓW Słowa kluczowe: harmonizacja baz danych, atrybuty budynku, kataster nieruchomości, dane ewidencyjne budynku