Luke Sloan discusses space-time as a sampling condition for new social media research during a seminar on quantitative methods in social media research held at the OII on 26 September 2012. This brief talk introduces some of the issues that social scientists will have to contend with when applying traditional terrestrial modes of analysis to social media data. Based on the potential user requirements of the platform being developed at the Cardiff Online Social Media ObServatory (COSMOS), this talk reviews the need to reconceptualise sampling, demographics, geography and the temporal dimension with reference to naturally occurring locomotive data.