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Delete Duplicates

This action from the dialog Modify Objects enables to delete duplicates of objects based on specifiable criteria. This function is useful after import from third-party programs like e.g. ArcView or DXF (e.g. just for roads).

After confirming with OK a further dialog opens in which you can choose conditions for the deletion.

Having chosen several conditions, then all conditions are evaluated prior to the deletion with all duplicates. The first object placed in the object table is considered to be the original while subsequent are supposed to be the duplicates.

The duplicate is deleted only if the condition/s is/are met. In case several conditions are specified all of them must be fulfilled before the duplicates are deleted (logical AND). As restricting condition the following specifications can be used, individually or as a combination:

  • Name
  • ID
  • Geometry:
    • Snap: Enter a deviation (snap in meters). Objects which deviate not more than the given snap distance from the original will be deleted.
    • Polygons bidirectional: With this option activated duplicates will also be deleted when they match based on the specified criteria, but differ with first/last geometry point.
    • 2D only: With this option activated duplicates will also be deleted when they do not match with height coordinate/s (z), but match with xy-coordinates based on the specified criteria.
  • Keep Object with max. Weight: This option enables to define a criterion based on object attributes to control the deletion procedure.
    • Weight Function: Here you can select from the available object attributes in order to define a weighting function.