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How prevent Intersect from duplicating records?

Question asked by HJK on Mar 21, 2016
Latest reply on Mar 23, 2016 by HJK

I am using the Intersect geoprocessing tool on a small sample of individuals with lon/lat coordinates.   I'm intersecting them with blockgroups. 

 

When I do so, a number of records are duplicated, so that the original list of entries now is larger by a small fraction....2%.  But it shouldn't be larger at all, or at least, so it seems to me.

 

What am I doing wrong or what should I do in order to correct the duplication process?

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