González-Bailón, Sandra2023-05-222023-05-222013-01-012017-03-09https://repository.upenn.edu/handle/20.500.14332/2149Digital data tracking what we do, the time and place of our actions, and the chains of interdependence that link those actions together, help us draw a richer picture of human geography as it unfolds in its multiple layers. This commentary briefly illustrates the type of maps and models we can build with that data as well as some important challenges that arise from their complexity and unsolved validity concerns.©The Author(s) 2013. Reprints and permission: sagepub.co.uk/journalsPermissions.nav DOI: 10.1177/2043820613515379 dhg.sagepub.combig datadigital technologieshuman geographyvalidationCommunicationSocial and Behavioral SciencesArticle