Tides and the Catalan Atlas [1375] (DOI: 10.2436/20.3000.02.27) Autors/ores Vicenç M. Rosselló i Verger Universitat de València (UV) Paraules clau: Catalan Atlas, Cresques Abraham, historical cartography, tides, lunitidal intervals, medieval commentators, Isidorus Resum The Catalan Atlas [1375], attributed to Cresques Abraham, a Jew buixoler, is preceded by a long geographical, astrological and oceanographic text, part of which refers to the tides and is accompanied of the oldest known graph which shows 14 circumferences and 16 orientated sectors. In this article, we identify toponyms and discuss the sources of the theories of the lunitidal interval or establishment of a port and the texts (Isidorus, Honorius d'Autun or of Regensburg) and the classic roots of the theory.Key words: Catalan Atlas, Cresques Abraham, historical cartography, tides, lunitidal intervals, medieval commentators, IsidorusOriginal source: Cuadernos de Geografía, 86: 165-182 (2009) Descàrregues Les dades de descàrrega encara no estan disponibles. Descàrregues PDF (English) Número Núm. 5 (2015) Secció Geografia Llicència The intellectual property of articles belongs to the respective authors.On publishing articles to the journal Catalan Social Sciences Review (CSSR), authors accept the following terms:Authors assign to Philosophy and Social Sciences Section (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles published in Catalan Social Sciences Review (CSSR).Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Philosophy and Social Sciences Section declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.Catalan Social Sciences Review (CSSR) is not responsible for the ideas and opinions expressed by the authors of the published articles.