The aim of this study is to reveal whether and how retrospective and in situ data collected in the process of Participatory GIS differ. This well suited technique serves for mapping the spatial aspects of an individual's perception, and can be carried out from previous experiences (retrospectively), or directly as people go about their routine activities (in situ). The current study compares maps of people's perceptions of urban space in Olomouc city, Czech Republic and in Manchester, UK using

more »

... oth approaches. Evaluating how conclusions differ between these approaches contributes to better understanding and interpretation of geospatial participatory data in future.