Abstract

The paper proposed a methodology for dasymetric development of a detailed population map for a city environment. The recalculation of population is based on linking the national database on buildings (BDOT) with the available statistical information about population density. The experiment was conducted in the city of Cracow, using demographic data with a high level of detail, related to the urban units of the city. The generation of population maps was performed for several options, dividing the buildings depending on their characteristics and location. The optimisation stage was based on a properly adjusted surface-weight method of correlation, where the global number of people in the city was used, while the statistical data from 141 urban units was considered to be reference data. The obtained results justify the division into single-family and multi-family buildings. The original connection between the function of population and the inhabitable area of a building (41 m2/person) was differentiated during optimisation: for single-family houses (84 m2/person) and for multi-family houses (37 m2/person). Due to this, the MAPE errors were improved from 48% to 30%, and RMSE from 2896 to 2684. Having performed additional segmentation of urban units according to the average inhabitable areas per person recorded for them, the parameters dropped down to: MAPE 10%, RMSE 1146.

Key words: demographic data, dasymetric modelling, topographic data, national database on buildings