With maps, as with life, defining something as wrong or right depends entirely on your standpoint. One persons west is another persons east, one persons left is anothers right. And vice versa. I think.
Youd think maps would be unequivocal about this sort of thing, but youd be wrong- in fact theres a whole world of back to front, inside out and the wrong way round in maps. Here are just a few examples.
First, celestial maps, that most confusing of genres. Anyone who has looked closely at a historical celestial globe or chart will notice that in the majority of them the constellations do not match up with how they appear in the night sky. They are reversed. For example, the sword and scabbard of Orion hang to the right of his belt in Thomas Hoods 1590 celestial chart, but in fact the Orion Nebula is on the left of the constellation as you look at it in the night sky.
Constellation of Orion, from Thomas Hoods 1590 celestial chart
Theres a remarkably good explanation. For much of history the celestial sphere was thought to be just that a vast globe encasing our own globe, with all of the stars and celestial phenomena studded onto it. Since we, the globe viewer, are standing outside of the globe, of course the constellations are reversed. The cases of tiny 17th and 18th century pocket globes, with their interiors papered with celestial hemispheres, visualise it very well.
J.B.Homann, Globus Coelestis / terrestris, c.1700.
It all makes perfect sense really, though such maps are pretty useless if you want to use one to locate a star in the night sky.
So much for the quirks of celestial cartography. What about a bit of good old incompetence and blunder? Why not spare a thought for the producer of the first printed map to be included in a Bible, the Zrich Old Testament by Christopher Froschauer of 1525. The map was copied from the famous c. 1515 map of the Holy Land by the German artist Lucas Cranach. But the copyist didnt think to first create a reversed image of his model before cutting its outlines into a woodblock to print his map from. His finished map shows the Mediterranean Sea positioned weirdly to the east of Israel, not the west.
Lucas Cranach the Elders map of c. 1515
.. and the unfortunate copy, published in 1525 (Trinity College Library, Cambridge, A.10.18).
Back-to-front issues are everywhere, even in the world famous Hereford Mappamundi of around 1275, where the illuminator apparently got in a muddle and reversed the labels for Europe and Asia.
The Hereford World map, c. 1275 (Hereford Cathedral)
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A detail of the Hereford Mappamundi of 1275 showing the letters of Africa over part of southern Europe
and a detail of the Alps and north Adriatic Sea with the R and I of AFRICA in large gold letters
The sympathetic historian Evelyn Edson described the obvious mortification he must have felt when he realised, and in gold leaf too! However, another historian, Marica Milanesi, believed the reverse labelling was entirely intentional in order to follow the late medieval concept of the map as a mirror of reality.
Milanesis argument is persuasive, but theres no accounting for incompetence.
This post was previously published on blogs.bl.uk and is republished here under a Creative Commons license.
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