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On a map: erasing everything but the frontiers.

Discussion in 'General GIMP help' started by Christophe Genolini, Jan 12, 2015.

  1. Christophe Genolini

    Christophe Genolini New Member

    Mar 28, 2008
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    Hi all,

    I am using Gimp for windows, last version. I have many maps with a lot of details on it, like this one:


    I would like to erase all the details, keep only the frontiers (in orange) or the water (in blue). I there a way to do that?

    Thanks a lot.

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