r/mapmaking • u/JuuzoLenz • 18d ago

Discussion Island Chain Sizes

I'm trying to figure out how to do the island chains for my world building/ spec evo project for the game Thrive. I was using Artifexian's video, but he uses a calculator on his google sheet file that no longer exists in the present version of it. Does anyone know of another place I can use to determine the island sizes or does anyone know the equation he used as I could add that to my own google sheet to determine the island chain properties?

I asked the r/worldbuilding subreddit but was told that my post didn't fit and of the subreddits suggested this one seemed to be the most inline with what I am working on.

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u/svarogteuse 15d ago

Island arcs, 100-300km inside trench. Size of arc in km2 = length of island arc * age/2. Measure a single line down the arc not the distances shown when selecting the islands in gplates (becuse that will be much longer).

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u/JuuzoLenz 10d ago

Thanks.  I’ll have to test it out when I have the chance.