I am preparing a map of cluster assignments for a publication that seeks to minimize negative space in their figures. This is what my map looks like:
Notice the distant island in orange? I want to emphasize the fact that its far away without showing the all the negative space. The issue in bar/scatter/line graphs is simple: make the axes discontinuous with a zigzag or a gap in the axis line. But for a map like this, where there are no axis and distance is purely qualitative, how do I demonstrate the difference of the orange cluster without the negative space?