Dear Colleagues, On behalf of the open access journal IJGI (ISSN 2220-9964, Impact factor 2.239), we would like to inform that the deadline for the Special Issue on "Social Computing for Geographic Information Science" has been extended to 31 March 2021. Papers may be submitted immediately or at any point until 31 March 2021, as papers will be published on an ongoing basis. This Special Issue is dedicated to explore current trends and research opportunities related to geographic information science through the lens of social computing, from a threefold perspective: (1) theoretical, by exploring how to develop new conceptual frameworks for effectively fusing geographic and social information for representing and understanding geo-social relationships networks; (2) computational, by investigating how to innovatively use social computing techniques for geographic information science issues, including making spatial data more accessible, creating user-friendly environments for interacting with this data, analysing and reasoning on big social sensing data; (3) applicative, by understanding how the analysis of social geo-located data can be applied to various human activity domains, including languages, political elections, emotion recognition, disaster management, smart cities, and disease spreads. We call for original contributions from a wide range of cross-disciplinary and collaborative domain knowledge related to geographic information science and social computing, such as cognitive science, information science, computer science, linguistics, and social science. Topics of interest include (but are not limited to): - Social media geographic information analytics - Social sensing - Retrieving, processing and interpreting social geo-located data - Voluntary Geographic Information (VGI) management - Location-based social networks - Modeling of spatial-social human interactions - Collaborative interactions with geographic information - Sentiment analysis approaches for social geo-located data - Geographic Human-Computer Interaction For more information on this Special Issue and submission guidelines, please visit the following page: https://www.mdpi.com/journal/ijgi/special_issues/socil_comp_GIS Kind regards, Dr. Arianna D'Ulizia Dr. Patrizia Grifoni Dr. Fernando Ferri IJGI is fully open access. Open access (unlimited and free access by readers) increases publicity and promotes more frequent citations, as indicated by several studies. Open access is supported by the authors and their institutes. The Article Processing Charges (APC) for accepted papers are CHF 1000. For further details on the submission process, please see the instructions for authors at the journal website. https://www.mdpi.com/journal/ijgi/instructions