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Transition from centralized to market economy has led to deep restructuring of urban land use. It is particularly important for the shift between the two trends: deindustrialization of the 1990s and economic tertiarization of the 2000s. Post-communist built-up space dynamics has manifested in two phases: a) before 2000, with industrial destructuring and insular appearance of commercial spaces within big residential zones; b) after 2000, with extending residential areas on city's periphery and in suburbs, as well as with logistic and commercial facilities in sub-and peri-urban areas. Dynamics of built-up space has been evaluated using spectral mixture analysis of remotely sensed data, extracted from two Landsat5TM images (acquired in 1988 and 2010). Comparative analysis of the results has led to identification of the areas with increasing and decreasing density of built-up spaces. This analysis was realized in order to verify the hypothesis, according to which peri-central areas are more preferable for new buildings, even when there is enough free space in central area. These results, reflecting the dynamics of built-up spaces in Bucharest city, are the effect of certain processes, frequently chaotic, reflected on the urban landscape. [ABSTRACT FROM AUTHOR]