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Analysis of Geometrical Properties and Content of Old Maps – an Example of Map of the Croatian Cartographer Fernando Consag – Croata Varasdinensis

Fernando Consag – Croata Varasdinensis is a Croatian cartographer, missionary, Jesuit and the founder of Lower California (Baja California). The result of his three expeditions in 1746, 1751 and 1753 were several maps of Lower California and the Bay of California and the diaries of the first and the second expedition. The map of California and Consag’s diary of the first expedition were published in Madrid in 1757 and then presented to King’s advisors. After many confrontations, King of Spain officially recognized that Lower California is a peninsula, not an island, on the basis of Consag’s map and diary of his first expedition in 1746. This paper analyzes geometrical properties and the content of Consag’s map taking into account latitude-measuring methods, graphic map scale, geographical coordinates assigned at the map border and other map characteristics. There are some suggestions for map georeferencing into contemporary cartographic model.

Fernando Consag – Croata Varasdinensis; Lower California (Baja California); map; diary; longitude; graphic map scale; georeferencing

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