The inspiration to undertake the subject was the announcement of preparations for project Poland 3D+. First the presentation of background analysis of modelling methods was sketched. Then the principles of buildings modelling, imposed by INSPIRE specification, were recalled. Next the conditions of conversion of 2D spatial database to 3D ones, on the basis of experience acquired thanks to the research project performed in AGH in the years 2009 - 2012, was discussed. The research indicated airborne scanning as the best data source but at the same time indicated that highly detailed models considered for large areas may turn out to be poorly efficient for the GIS technology. Then t he systematization of modelling methods of airborne scanning, with emphasis on advantages and disadvantages of the approach model driven and date driven, was presented. The thesis is concluded with a suggestion of modelling strategy in the context of condition of geo - reference databases in Poland, prospects of their development and demand for spatial data from the social and economic point of view. A gradual solution was suggested, in which, firstly, attempts are made to apply the model driven method and in case of failure, the data driven method is applied, which enables modelling the buildings of complex shapes but doe s not guarantee full automation. Such a procedure, in the opinion of the authors, would be optimal at implementation of project Poland 3D+.