Hi Im entirely new to this site but not so new to cartography in general. Now Ive made a general map with inkscape for a fantasy world Im creating and Im wondering how I expand on it using GIMP? Im basically looking to make an easily editable map that allows me edit the map, using layers I guess, to show changes in geopoliticis, cities, climate change etc... So simply put my question is how do I use the outline I already have to start in GIMP?