{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T14:15:06Z","timestamp":1785593706853,"version":"3.56.0"},"reference-count":25,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T00:00:00Z","timestamp":1718150400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>Traditionally, it has been considered that the Ptolemaic or classical maps from the four editions of Ptolemy\u2019s Geography published in Rome (1478, 1490, 1507, and 1508) are apparently indistinguishable at first glance because they have been printed from the same plates. This poses a problem for antiquarians, collectors, and curators who wish to accurately date their copies. Recently, two very comprehensive articles have been published on the different paper watermarks associated with each edition, which would allow for the correct identification of each one. However, there are occasions when the maps do not display watermarks. This article aims to provide some keys to distinguish between the incunabula editions (1478, 1490) and those of 1507\u20131508 in cases of the absence of watermarks. In this process of detecting differences, we have used digitized images of the maps. The results show small modifications in the copper plates made between the editions of 1490 and 1507\/08. Our findings reveal that seven previously unknown reworked maps have been identified.<\/jats:p>","DOI":"10.3390\/ijgi13060195","type":"journal-article","created":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T04:15:27Z","timestamp":1718165727000},"page":"195","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Identifying Editions of the Ptolemy of Rome Maps (1478\/90\u20131507\/08) by Copper Plates Changes"],"prefix":"10.3390","volume":"13","author":[{"given":"Marcos F.","family":"Pavo-L\u00f3pez","sequence":"first","affiliation":[{"name":"Instituto Geogr\u00e1fico Nacional, 28003 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1218-1075","authenticated-orcid":false,"given":"Jos\u00e9-L\u00e1zaro","family":"Amaro-Mellado","sequence":"additional","affiliation":[{"name":"Departamento de Ingenier\u00eda Gr\u00e1fica, Universidad de Sevilla, 41092 Seville, Spain"},{"name":"Instituto Geogr\u00e1fico Nacional-Servicio Regional en Andaluc\u00eda, 41013 Seville, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,12]]},"reference":[{"key":"ref_1","unstructured":"Woodward, D. 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