This game is unrelated to A&A, so I am closing this topic here in favor of your similar question here:
https://forums.triplea-game.org/topic/3735/how-does-the-diplomacy-map-work
Map creator help
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On part 2 what is map center and map imaged location? :?
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if you are referring to the triplea map maker, please post your questions here:
http://triplea.sourceforge.net/mywiki/Forum