What check can find redundant points in a feature class?

[MartinHvidberg]

I need to check a if a point feature class contains any double (or triple) points.
The points initially come from a number of sources, and have been merged. There is a chance that the same point was in several of the original feature classes, and therefore now exist in multiple copies.

What data reviewer check can I use to check for redundant points in a feature class?

Best regards
Martin

PS I use 10.1 and the data are in a NIS data base, but that is unlikely to be relevant...

[T__WayneWhitley]

If you're talking about uniqueness on an attribute, then there's a check on that with Data Reviewer:

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Checking_for_unique_IDs/01020000000z00...


...or, for spatially coincidence features there is the Duplicate Geometry check:

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Finding_duplicate_geometry/01020000002...


Otherwise, if you don't have Data Reviewer, you can check for duplicate attributes in a feature class or table using Summary Statistics or Frequency.

[MichelleJohnson]

I also wanted to add that for Duplicate Geometry check, this will look for features that are within the database XY tolerance.  If the redundant point features may be slightly offset from each other, you can use the Geometry on Geometry check and apply a tolerance.

Both Geometry on Geometry and Duplicate Geometry allows you to select which fields you want to compare to determine if it's has the same field values.  You can also exclude metadata fields, like last edited date or last edited by, when comparing the fields.

[MartinHvidberg]

I'm talking about the latter:

...or, for spatially coincidence features there is the Duplicate Geometry check:
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Finding_duplicate_geometry/01020000002....

But this check assumes that the 'duplicates' are in seperate feature layers.
My 'duplicates' are all in the same feature layer - and they are not found by this check.

Best regards
Martin

[MichelleJohnson]

You should be able to pass the same feature class for Feature Class 1 and Feature Class 2 in the Duplicate Geometry and/or Geometry on Geometry Checks to find duplicate within the same feature layer.