Disperse Markers Algorithm
In ArcGIS you can run a tool which finds points that are on top of each other (ie any_interact) and moves them so they no longer interact and have a small buffer around them so when viewed on a map all are visible.
http://resources.arcgis.com/en/help/main/10.1/index.html#//00700000002n000000
Does anyone know how to do something similar using only PL/SQL?
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