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Select overlapping points within a single layer

Question asked by gizagui on Jan 23, 2014
Latest reply on Feb 6, 2014 by gizagui

I have a large point layer representing addresses of users of a public service. In the case of buildings, I have stacked points, one for each user.

I want to unify overlapping points  (one point feature), and create a relationship between the building footprint and a non-spatial table containing rows for each user.

I need to select only the points that overlap with other points (the number of overlapping points is variable) and I tried to do it by creating a topology rule "Must Not Overlap", but when validating the topology I get the following error: "Validate Topology failed. A failure was detected inside the topology engine overlay processor. [error id: 220]". This is because my point feature class has many coincident points and a very large number of topology errors are generated.

So, is there a simple way to select points that overlap eachother within the same layer?

Thanks in advance.