The Geographies of the Twin Planets Anarres and Urras of the Tau Ceti Star System: a Comprehensive Guide for the Ekumen Traveller

Four years. That’s how long I’ve been working on these maps. My first “commit” to the git-repository that set me on this journey, a tool for calculating and performing projections from one projection to another, was on December 31st 2012 [0], but I remember that I started working on the code in October or November. Any way — Four years! A lot can happen in four years. I’ve changed jobs twice, and am now working with maps as part of my work as a software developer. This is not something that I would have expected, but it is welcome, and I really do feel that what I’ve learned by mapping Tau Ceti has helped me with my work. Thinking about the balance of aesthetics and information content, the merits and drawbacks of different projections — these are important considerations for what I do today. I’m still an amateur in the field, but an amateur with some confidence built from experience, and who knows something of what questions to ask, even if I don’t have the answers. Four years is also the time that Dr Grijndvar has been away on an extended expedition across the Atlantic, but he returned safe and sound yesterday — welcome home, dear friend!

So what have I learnt, and what have I done all this time? Before getting to that, I would like to start with my usual advice to the reader, that this text is very long and mostly written for my own sake: should you wish to skip directly to the maps, then please do so – no hard feelings! I have also compiled a list of the tools I have used at the end of this article, which may be of interest to some – all are free (as in free speech) and open source, and available for anyone to download and use.

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Urras and Anarres, an addendum

I realised that using the script I had written to make the maps of Tau Ceti, it would be a simple matter to make an animation giving the illusion of a spinning planet. The orthographic azimuthal projection approximates this very well, and once one has access to the equirectangular map, there is nothing special about the two particular hemispheres used in the original maps — any meridian can be used as the centre meridian of the projection!

Edit: I have now added an animation of Gethen as well.
Edit 2: As an astute reader pointed out below, the original animations spun westward, meaning that the sun would rise in the west and set in the east, contrary to one’s expectation. There is no physical reason why the opposite should be preferred, but it feels more natural, and there is evidence in the books for this interpretation, wherefore I’ve updated the animations.
Breaking News! New and improved versions of the maps available here!

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Ursula K. Le Guin’s Tau Ceti, a planetary survey

Warning: Wall of Text!
This was supposed to be a post about some maps I’ve drawn, but it turned into a minor essay (featuring fifteen footnotes and two poems). This regularly happens when I set about describing my work (this paragraph is no exception). I am terrible at leaving unimportant details out of the picture. Since the readership of this blog is very limited, however, I have decided that it is all right this way. I wrote it mostly for myself anyway. If you don’t want to read about my love for maps and my love for the works of Ursula K. Le Guin, feel free to jump to the maps, or got to Get Stuff where you will find more versions. (I also made some animations of the planets revolving which can be found in a follow-up post.) If, on the other hand, you are interested in the background to and process involved in the making of the maps, you are more than welcome to continue reading.

Breaking News! New and improved versions of the maps available here!

Fan-cartography

I’ve always loved maps.

I remember, that when I first discovered fantasy (through The Hobbit, as it were), for many years I held the opinion, that a map was a sure sign of a good novel. If there were ample appendices or a word-list for a made up foreign tongue, all the better! I have since realised that a map is not a sure sign that a book is worth my time, and that not all the appendices in the world could save a bad book from being bad read — I remember one fantasy heptology in particular, whose appendices were beyond most in ambition, but whose story soon dwindled from acceptable to dull, and in the end turned offensively stupid. But I still hold, that a mediocre book can be saved by an inspired map, and that a good map always makes a good book more memorable.

After The Hobbit, I read Tolkien’s Lord of the Rings (great appendices), Eddings (mediocre, but good maps) and the Earthsea trilogy by Le Guin (excellent and with excellent maps [0]). At some point I discovered Science Fiction, and started to prefer it to Fantasy, even though science fiction novels seem to be utterly devoid of maps. Until I discovered The Dispossessed. Science fiction, by an author I knew I liked, from having read The Word for World is Forest and the Earthsea books — with a map!

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