How can I find how many duplicates I have in my dataset (areas, lines, points) using ArcMap?

With topology I can find overlapping objects, but I want to find duplicates.

Are there any tools from toolbox?


According to the help docs for: Finding duplicate geometry for ArcMap 10.4:

  1. Start ArcMap.

  2. On the main menu, click Customize > Toolbars > Data Reviewer.

  3. Click the Select Data Check drop-down arrow on the Data Reviewer toolbar, click the plus sign (+) next to Duplicate Geometry Checks, then click Duplicate Geometry Check.

    The Duplicate Geometry Check Properties dialog box appears.

You can then set the feature class, check for identical matches in attributes etc.

  • What should I do when I don't have "data reviewer"? – Gosia S. Jun 10 '16 at 11:39
  • @GosiaS. - This is assuming you have the Data Reviewer license, which if you do then you may need to install it: Installing ArcGIS Data Reviewer for Desktop. Saying that, I think Aaron's answer is correct as you mentioned finding duplicates in your dataset, not necessarily in the geometry... – Joseph Jun 10 '16 at 11:47
  • Ok, I install it. What should I do now, when my data reveiwer toolbar is not active? I can't click on any button? – Gosia S. Jun 10 '16 at 12:14
  • @GosiaS. - Does Aaron's answer solve your problem? – Joseph Jun 10 '16 at 12:17
  • I don't think that "Find Identical" tool is working right on my dataset, i want to use Data Reviewer but i don/t know how to activate this buttons – Gosia S. Jun 10 '16 at 12:23

You can use the Find Identical (Data Management) tool to find duplicate features or records.

Reports any records in a feature class or table that have identical values in a list of fields, and generates a table listing these identical records. If the field Shape is selected, feature geometries are compared.

The Delete Identical tool can be used to find and delete identical records.

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