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When a legal professional or a citizen tries to understand how a given phenomenon is disciplined, his attention cannot be limited to a single source of law but has to be directed on the bigger picture resulting from all the legal sources related to the theme under investigation. Knowlex exploits data visualization to support this activity by means of interactive maps making sense out of heterogeneous documents (norms, case law, legal literature, etc.). Starting from a legislative measure (what we define as Root) given as input by the user, the application implements two visual analytics functionalities aiming to offer new insights on the legal corpus under investigation. The first one is an interactive node graph depicting relations and properties of the documents. The second one is a zoomable treemap showing the topics, the evolution, and the dimension of the legal literature settled over the years around the norm of interest. The article gives an overview of the research so far conducted presenting the results of a preliminary evaluation study aiming at evaluating the effectiveness of visualization in supporting legal activities as well as the effectiveness of Knowlex, the usability of the proposed system, and the overall user satisfaction when interacting with its applications.<\/jats:p>","DOI":"10.1177\/1473871616681374","type":"journal-article","created":{"date-parts":[[2017,9,12]],"date-time":"2017-09-12T00:19:33Z","timestamp":1505175573000},"page":"332-345","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":22,"title":["The legal macroscope: Experimenting with visual legal analytics"],"prefix":"10.1177","volume":"16","author":[{"given":"Nicola","family":"Lettieri","sequence":"first","affiliation":[{"name":"ISFOL, Rome, Italy"}]},{"given":"Antonio","family":"Altamura","sequence":"additional","affiliation":[{"name":"Department of Computer Science, University of Salerno, Fisciano (SA), Italy"}]},{"given":"Delfina","family":"Malandrino","sequence":"additional","affiliation":[{"name":"Department of Computer Science, University of Salerno, Fisciano (SA), Italy"}]}],"member":"179","published-online":{"date-parts":[[2016,12,28]]},"reference":[{"key":"bibr1-1473871616681374","doi-asserted-by":"publisher","DOI":"10.1109\/TVCG.2007.70540"},{"key":"bibr2-1473871616681374","unstructured":"Ravel Law\u2014legal research and analytics, https:\/\/www.ravellaw.com\/search (accessed 20 July 2016)."},{"key":"bibr3-1473871616681374","unstructured":"lexmex.fr, http:\/\/www.lexmex.fr\/ (accessed 20 July 2016)."},{"key":"bibr4-1473871616681374","unstructured":"Interactive visual analytics, http:\/\/www.ftitechnology.com\/radiance-visual-analytics-software (accessed 10 September 2016)."},{"key":"bibr5-1473871616681374","unstructured":"Visualizing scientific landscapes, http:\/\/www.vosviewer.com\/ (accessed 10 September 2016)."},{"key":"bibr6-1473871616681374","unstructured":"A tool to visualise hyperbolic trees and graphs, https:\/\/sourceforge.net\/p\/hypergraph\/news\/ (accessed 10 September 2016)."},{"key":"bibr7-1473871616681374","volume-title":"Visual insights: a practical guide to making sense of data","author":"Borner K","year":"2014"},{"key":"bibr8-1473871616681374","doi-asserted-by":"publisher","DOI":"10.1109\/MCG.2004.39"},{"key":"bibr9-1473871616681374","volume-title":"Illuminating the path: the research and development agenda for visual analytics","author":"Thomas JJ","year":"2005"},{"key":"bibr10-1473871616681374","doi-asserted-by":"publisher","DOI":"10.1145\/1121949.1121979"},{"key":"bibr11-1473871616681374","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-319-22723-8_8"},{"key":"bibr12-1473871616681374","first-page":"4189","volume-title":"Proceedings of the 33rd annual ACM conference on human factors in computing systems (CHI \u201915)","author":"Klouche K"},{"key":"bibr13-1473871616681374","volume-title":"Proceedings of the IEEE symposium on visual languages (VL \u201996)","author":"Shneiderman B"},{"key":"bibr14-1473871616681374","doi-asserted-by":"publisher","DOI":"10.1109\/2945.841119"},{"key":"bibr15-1473871616681374","doi-asserted-by":"publisher","DOI":"10.1057\/palgrave.ivs.9500114"},{"issue":"2","key":"bibr16-1473871616681374","first-page":"92","volume":"34","author":"Bauder J","year":"2015","journal-title":"Inform Technol Libr"},{"key":"bibr17-1473871616681374","unstructured":"libcurl\u2014the multiprotocol file transfer library, https:\/\/curl.haxx.se\/libcurl\/ (15 July 2016)."},{"key":"bibr18-1473871616681374","volume-title":"Proceedings of the 4th workshop on legal ontologies and artificial intelligence techniques (LOAIT 2010)","author":"Francesconi E"},{"key":"bibr19-1473871616681374","unstructured":"Agnoloni T, Marinai E, Peruginelli G, et al. 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