Except for a couple of posts here and there, I really haven’t focused on the phenomenon of maps on postage stamps. But it’s very much a thing, and has been for some time: the CartoPhilatelic Society has been around since 1955. And there are a lot of examples of stamps with maps on them: the Society’s checklist has 41,300 entries, and there are 17,906 examples on the searchable database that is Gilad’s Maps on Stamps. Strange Maps gives the subject a proper writeup, grouping stamps by several themes.