Guide To Figuring Out The Age Of An Undated World Map [xkcd]
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https://xkcd.com/1688/ <-- shared XKCD comic
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This xkcd comic (link above) features a handy flow chart that helps you figure out the age of an undated world map..
#GIS #spatial #mapping #cartography #cartographer #map #maps #ancientmap #globe #global #oldmaps #humour #humor #xkcd #comic #cartoon #dating #undated @xkcd