I have a polygon layer containing "depth curves" for the making of a skin of earth kind of map. I want to check whether or not my feature class contain any overlaps internally between these polygons. What kind of tools can I use for this? Ideally i would like to end up with a feature class containing the bits of overlaps, so i have the possibility to check graphically where my features overlaps. And if I could somehow implement this in a larger model, things would really look good.
When in doubt if your single polygon feature class contains self-overlapping polygons, and when this constitutes an error in your final product, you could run the intersect tool. I didn't know that the tool itself could handle a single input, but it turned out that it works in precisely the same way which it would have done when analyzing multiple inputs. Link to ArcGIS Intersect tool. It's a fairly easy way to get a graphic view of "geometric" errors in your layers. Like the image below where the scraped area symbolizes an internal overlap within a single polygon feature class which in this case represent an unsurveyed area at sea.