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Retaining UNIQUE attribute fields after dissolving a shapefile

Retaining UNIQUE attribute fields after dissolving a shapefile


I tried the solution to "Dissolving shapefiles but retain attribute fields" but my original shapefile (3000 rows in attribute table) has many duplicate values in the field that I want to retain so that the merge overruns the field width. Is there a way to merge only unique field values in the merged attribute field?


Take a read of the article HowTo: Identify duplicate field values.

From there do the following:

  • set your definition query for the layer you made toFIELD NAME = 0(this will identify all values that are unique.
  • run your dissolve function on the data

Watch the video: HowTo ArcMap - Add a field to a table attribute table Mon, Jan 19, 04 05 PM