In this paper, the relationship between trace and geographical space is discussed from the digital footprint perspective by integrating the spatial dimension. Indeed, within the growing use of the Internet the variety of digital footprint tend to widely multiply. We firstly define and characterize the different types of geodigital traces in order to emphasize on their various way of production. We secondly provide an analysis of their unique potential as food for thoughts in sciences which deal with the spatial dimensions of social dynamics and facts. Epistemological, methodological and ethical issues regarding the use of spatial digital footprint are finally considered.