If I have two polygons that share a common boundary (I created them with auto-complete polygon), how do I get the shared boundary to show up for each polygon if I use a hollow space with a colored border? I guess right now it just draws one on top of each other. Is there a way to see both boundaries?
Mapping Center Answer:
If you only have one instance where you need to create a view of overlapping borders, then one option is to use cartographic representations and using an override, offset one or both of the boundary lines from the true position. This will change the appearance of the boundary only -- it will not chagne the underlying data. If you have many instances of this, you might still want to try out carto reps as a solution but instead use and offset. This will affect all boundaries, though, not just the ones that are coincident. To ONLY have this affect the coincident boundaries, you would have to convert the polygons to lines and symbolize the lines that make up the boundaries of the polygons. We have answered similar questions about how to symbolize coincident boundries in the past, if this is the route you ultimately take:
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